Step 1

For Toulouse sausages, place pork and back-fat in a bowl with 1 tsp sea salt flakes and ¼ tsp coarsely ground black pepper, toss to coat, cover and refrigerate overnight. Drain off liquid, pat meat and fat dry with paper towels, then cut into 1cm dice or pass through the coarse attachment of a mincer. Combine in a bowl with allspice and refrigerate until chilled (20-30 minutes). Transfer to a piping bag fitted with a 2cm nozzle. Carefully slide pork casing over nozzle, leaving enough casing to tie a knot at the end, then gently squeeze piping bag so sausage mixture begins to fill casing. Continue until casing is filled, leaving a small length at the end to tie off (you may need to do this in a couple of batches). Pinch casing at 10cm-12cm intervals. Carefully twist casing to form firm sausages, alternating twisting direction each time. Tie off end and hang in refrigerator over a tray to dry slightly and allow flavours to develop (at least 6 hours or overnight). Raw sausages will keep refrigerated for 3 days.

Step 2

For duck confit, place duck in a non-reactive container, add salt, garlic, herbs and peppercorns, turn to coat, cover and refrigerate overnight to cure. Preheat oven to 120C. Rinse duck, reserving garlic and herbs, pat dry with paper towels and place in a baking dish that holds it snugly. Pour duck fat over duck, add reserved herbs and cook in oven until meat is falling from the bone (2½-3 hours). Allow to cool completely in fat, then refrigerate until required. Duck confit will keep completely submerged in fat for a month.

Step 3

Drain cannellini beans, cover with plenty of water in a large saucepan, bring to a simmer and cook until tender (40-50 minutes). Drain.

Step 4

Preheat oven to 170C. Fry bacon and onion in olive oil in a wide casserole over medium-high heat until just golden brown, adding garlic in the last minute of cooking (10-12 minutes). Remove from pan and reserve. Fry sausages in casserole, turning occasionally, until browned all over (4-6 minutes). Remove and cut into large pieces. Add tomato and stock to casserole, bring to a simmer, then return onion mixture to casserole along with sausages, confit duck, beans and rosemary, and bring to a simmer. Transfer casserole uncovered to oven and cook until beans absorb the sauce and are very tender, and a crust forms on top (1-1½ hours).

Step 5

Meanwhile, for toasted crumbs, fry breadcrumbs in fat or oil in a frying pan over medium heat until golden and crisp (10-15 minutes). Add parsley and garlic, stir-fry until fragrant (1-1½ minutes), then scatter evenly over cassoulet along with flat-leaf parsley and serve with crusty bread and a simple green salad.