The day before cooking, rub the salt into the duck legs, refrigerate and leave for 24 hours to cure

On the day of cooking, preheat the oven to 100°C/gas mark 1/4

Wash the legs thoroughly under cold running water and pat dry. Place into a small deep ovenproof dish. Cover with the duck fat and seal with tin foil

Cook in the oven for approximately 10-12 hours, until the duck legs are soft and you can remove the thighbone with ease

When the duck is cooked, remove from the duck fat and place onto a flat baking tray skin-side down. Remove the thighbones and refrigerate. The fat can then be strained and stored in the fridge to use up to 3 more times

In a heavy-bottomed pan large enough to hold all of the coco beans and chicken stock, sweat down the shallots, garlic and carrots in a little olive oil. Add the coco beans, Toulouse sausages then the chicken stock

Simmer on a low heat until the beans are soft - this should take approximately 30-45 minutes. Take care not to overcook or cook too quickly, or the beans will become broken and mushy

Drain off the excess stock (reserve this for later) and leave the beans and sausages on a tray to cool

Preheat the oven to 180°C/gas mark 4

Add the Toulouse sausages to the baking tray with the duck legs and place in the oven for approximately 12-15 minutes, until the skin of the duck is crisp and the sausages have a good colour

Whilst the duck is in the oven, place a heavy-bottomed pan on a medium-high heat and caramelise the diced pancetta in a little oil. Add the cooked coco beans, the diced orange zest and excess chicken stock and reduce the heat to a simmer

Season the beans with salt and pepper and cook for about five minutes until the excess liquid is mostly gone, leaving a moist but creamy bean cassoulet

Remove the duck and sausages from the oven and roughly slice the sausages. Add to the bean cassoulet, then pour into a serving dish and place the crispy duck on top. Sprinkle with chopped parsley and serve immediately