Slow-Cooked Sausages with Butter Beans & Fennel
Our gluten-free free-range pork sausages, braised gently with butter beans, fennel, white wine and tomato — a one-pan supper with the soul of a cassoulet and the lightness of high summer.
There is a particular kind of supper that asks almost nothing of you and gives back everything: the slow braise that fills the kitchen with its scent while you get on with your evening, then arrives at the table deep, savoury and generous. This is that dish, built around the humblest thing in the shop and the one we are quietly proudest of — a properly made pork sausage. Browned slowly, then left to tick away in the oven with butter beans, fennel and a splash of white wine, they become something far greater than the sum of their parts. It is cassoulet’s easy-going summer cousin: all the comfort, none of the ceremony, and only one pan to wash.
A sausage is only ever as good as the butcher who makes it, and this is where a great many fall down. The Traditional Pork Sausage is made from free-range shoulder and belly — the two cuts that give a banger its character, the shoulder for deep, worked flavour and the belly for the soft fat that keeps it juicy. The meat is coarsely minced rather than whipped to a paste, so you get texture and bite; the fat sits at around a quarter of the mix, which is exactly what a sausage wants: less and it cooks dry, more and it turns greasy.
What it does not contain is rusk. Most sausages are bulked out with breadcrumb or rusk, which soaks up water and pads the weight — ours is gluten-free, so every bit of its body comes from the pork itself. That matters enormously in a slow braise. A rusk-heavy sausage swells, softens and finally disintegrates into the sauce; a meat-bound one stays plump and intact through ninety minutes in the oven, giving up flavour without giving up its shape. The natural casing helps too, snapping cleanly rather than turning to rubber.
When you are judging a sausage, look for a coarse, marbled interior when it is cut, a fat that is creamy-white rather than grey, and a seasoning that lets the pork lead — white pepper, a little mace or nutmeg, sage — rather than drowning it. A good one browns to a real mahogany and smells of roast pork, not of herbs and salt alone. Buy the best you can; in a dish this simple, the sausage is the whole story.
- 8 Traditional Pork Sausages (about 600g)
- 2 tbsp olive oil
- 2 fennel bulbs, cut into wedges through the root, fronds reserved
- 2 onions, halved and thinly sliced
- 4 garlic cloves, sliced
- 2 tsp fennel seeds, lightly crushed
- ½ tsp dried chilli flakes
- 1 tbsp tomato purée
- 150ml dry white wine
- 1 x 400g tin chopped tomatoes
- 2 x 400g tins butter beans, drained and rinsed
- 300ml good chicken stock
- 2 bay leaves
- 2 rosemary sprigs
- 2 strips of pared lemon zest
- Sea salt and black pepper
- A knob of butter
- Reserved fennel fronds & a handful of flat-leaf parsley, chopped
- Extra virgin olive oil
- Zest of ½ lemon
- Brown the sausages slowly. Warm the olive oil in a large, heavy casserole over medium heat and colour the sausages on all sides for 8–10 minutes, turning often, until deeply burnished but not cooked through. Take your time — this is where the sauce gets its backbone. Lift them out and set aside.
- Colour the fennel. Add the fennel wedges to the same pan, cut-side down, and let them catch a deep golden edge for 4–5 minutes. Lift out and rest with the sausages; those caramelised faces will sweeten the whole braise.
- Sweat the onions. Lower the heat, add the onions with a pinch of salt, and cook gently for 12–15 minutes, stirring often, until soft, sweet and pale gold. Don’t rush this — a properly melted onion base is the difference between a good braise and a flat one.
- Build the aromatics. Stir in the garlic, crushed fennel seeds and chilli flakes and cook for 2 minutes until fragrant, then add the tomato purée and fry it for a further minute, until it darkens a shade and loses its raw edge.
- Deglaze with wine. Pour in the white wine and scrape up every sticky brown fragment from the base of the pan with a wooden spoon. Let it bubble hard for 2–3 minutes until reduced by half and the sharp smell of alcohol has cooked away.
- Make the sauce. Add the chopped tomatoes, chicken stock, bay, rosemary and pared lemon zest. Bring to a gentle simmer, season lightly, and let it find its rhythm for a minute or two.
- Braise, covered. Nestle the sausages and fennel back into the sauce, cover with a lid, and slide into a 150°C fan oven. Leave it to braise gently for 1 hour, undisturbed.
- Add the beans, uncover. Stir in the butter beans, then return the pan to the oven uncovered for a further 25–30 minutes. The sauce will thicken and turn glossy, the fennel will go spoon-tender, and the beans will drink up the flavour around them.
- Rest and enrich. Pull the pan out and let it settle off the heat for 5 minutes. Swirl through a knob of butter for a little gloss and body, taste for salt, and fish out the bay leaves and bare rosemary stalks.
- Finish brightly. Scatter over the chopped fennel fronds, parsley and lemon zest, thread a little extra virgin olive oil across the top, and carry the whole pan to the table with a good loaf to mop up the sauce.
The magic of this dish is patience applied in the right places. Browning the sausages slowly builds a deep fond — the caramelised residue on the base of the pan — through the Maillard reaction, and every bit of it is dissolved back into the sauce when you deglaze with wine. That single step is worth more than any amount of stock: it is concentrated, roasted flavour you would otherwise pour down the sink. Sweating the onions for a full quarter of an hour does the same job from the vegetable side, converting their harsh sulphur compounds into sweetness that underpins everything else.
The long, low oven does what a fierce hob never could. At 150°C the pan is surrounded by even, gentle heat, so the sausages stay plump and the beans warm through without catching or collapsing. Fennel, which is stringy and aniseed-sharp when raw, needs exactly this kind of slow, moist heat to turn silky and mellow — its liquorice edge softening into a background sweetness that flatters pork better than almost anything. Adding the beans only for the final half-hour is deliberate: long enough to take on the sauce, short enough that they keep their creamy shape rather than turning to mush. And that last knob of butter and lift of raw lemon and herbs at the end reawaken a dish that has spent ninety minutes turning rich and round, so it arrives savoury but never heavy.
The sausage is the one thing to keep excellent; almost everything else will bend. Our traditional pork sausage is ideal, but a good Toulouse or fennel-and-chilli sausage leans the dish further towards France or Italy respectively. Cannellini or haricot beans stand in happily for butter beans if that is what the cupboard holds — they are a touch firmer and just as good. No fennel bulb? A couple of sliced celery sticks bring a similar savoury freshness, though you will miss the sweetness; make up for it with an extra teaspoon of fennel seed.
For a smoky, autumn-leaning version, add a diced roasted red pepper and a pinch of smoked paprika with the aromatics, and finish with a few slices of chorizo crisped in the pan at the start. To turn it properly cassoulet, scatter the top with buttered breadcrumbs (or gluten-free crumbs) for the final 20 minutes uncovered and let them bronze. A handful of cavolo nero or chard stirred in with the beans adds greenery and turns it into a complete supper in one pan.
This is a dish that positively improves overnight, as the flavours settle and deepen. Make it a day ahead up to the end of the braise, cool quickly and refrigerate; it keeps for 3 days and reheats gently on the hob or in a low oven with a splash of stock to loosen. It freezes beautifully too, for up to 3 months — defrost fully in the fridge before reheating slowly until piping hot throughout. Add the fresh herbs, lemon and finishing oil only when you serve, so the bright top notes stay lively against the mellow braise beneath.
- Rushing the browning. Sausages blasted over high heat char on the outside while staying pale within, and worse, they split. Medium heat and frequent turning build colour evenly and keep the casings intact — this stage sets up the whole sauce, so give it the ten minutes it needs.
- Pricking the sausages. It is a stubborn habit and a bad one. Piercing the skin drains out the very fat and juices that keep a good sausage succulent. Leave them whole; a well-made sausage in a gentle braise will not burst.
- Salting the beans too hard, too early. If you are using dried beans, never salt them as they cook — it toughens the skins. And season the finished braise cautiously: the sausages and stock both carry salt, so taste before you reach for the pot.
Don’t be tempted to buy leaner sausages for a braise like this — the fat is doing essential work, melting into the sauce and keeping the meat succulent over a long cook. A sausage around 75% lean is exactly right; anything advertised as extra-lean will cook dry and give the dish nothing.
Wine: A juicy, unoaked red — Beaujolais or a young Chianti — with enough acidity to cut the richness. Beer: A Belgian-style saison, peppery and dry, echoes the fennel beautifully. Non-alcoholic: Cloudy apple juice cut with sparkling water and a squeeze of lemon; orchard sweetness against the savoury pork.
This is a one-pan supper that wants little more than bread — a crusty sourdough or a warm baguette to drag through the sauce is close to compulsory. Beyond that, keep the plate simple and summery: a sharp green salad dressed with plenty of lemon and mustard, or peppery watercress, cuts cleanly through the richness. In cooler weather, a mound of soft polenta or buttery mashed potato turns it into a proper feast. A spoonful of Dijon on the side is never unwelcome with good pork. Serve it straight from the casserole in the middle of the table and let everyone help themselves.
Can I use dried butter beans instead of tinned?
Absolutely, and they are worth the small effort. Soak 250g dried butter beans overnight, then simmer in fresh unsalted water for 60–90 minutes until tender but not collapsing before draining and adding as the recipe directs. Dried beans hold their shape better and drink up the sauce, and their cooking liquid — saved and reduced — makes a silky addition in place of some of the stock. Never salt beans while they cook, as it toughens the skins; season only once they are soft.
What are the best sausages for a slow-cooked casserole?
Look for a coarse-cut sausage with a high meat content — 85% or more — made from free-range shoulder and belly with a generous fat ratio, packed into natural casings. A well-made sausage like this holds together through a long braise and keeps its bite, where a cheap, finely emulsified banger turns pappy and leaches water into the sauce. Our Traditional Pork Sausage is gluten-free, so it is bound without rusk, which means all of its body comes from the meat itself.
Can I make this on the hob instead of in the oven?
Yes. Keep the casserole over the lowest possible heat with the lid ajar, and let it tick along for the same total time, stirring every 15 minutes or so to stop the beans catching on the base. The oven is gentler and more even — heat surrounds the pan rather than driving up through the bottom — but a hob works well if you keep the flame low and your eye on it.
How do I stop the sausages from splitting?
Brown them slowly over medium heat, turning often, rather than blasting them over a high flame — a sudden shock bursts the casing as the filling expands. Never prick good sausages; that only drains away the fat and juices you have paid for. Once they go into the braise the gentle oven heat keeps them intact and plump.
Is this recipe gluten-free?
It is, provided you keep it that way. Our Traditional Pork Sausage is made without rusk or breadcrumbs, so it contains no gluten. Use a gluten-free chicken stock, check that your tinned beans and tomatoes are plain, and serve it with a gluten-free loaf or simply with mash. Everything else in the pan — fennel, onion, wine, tomato, beans — is naturally free of gluten.
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