Vertical Wine Bistros Cassoulet De Toulouse

Name: Vertical Wine Bistro's Cassoulet De Toulouse
Ingredients: Salt and pepper; 250 g pork skin (optional); 500 g pork belly, cubed; 1 kg Tarbais beans, soaked overnight; 1 large whole onion; 12 whole cloves; 200 g duck fat; 1 bouquet garni with thyme, rosemary and bay; 500 g lamb shanks; 2 pieces duck leg confit; 1 cured garlic sausage; 500 g Toulouse sausage; 1 large onion, chopped; 2 carrots, chopped; 1/2 garlic head, minced; 6 tomatoes, chopped; 1 liter chicken stock; 1 cup panko bread crumbs; 2 Tbsp walnut oil; 1 Tbsp butter