½ head celery, finely chopped
1 small head fennel, finely chopped
4 garlic cloves, finely chopped
1 large onion, finely chopped
½ bunch sage leaves, chopped
200ml/7fl oz chicken stock
coarse semolina, for dusting
salt and freshly ground black pepper
½ tsp coriander seeds, toasted and ground
3 tsp fennel seeds, toasted and ground
2 tbsp olive oil
3 tbsp mascarpone
Parmesan, grated
500g/1lb 2oz good-quality pork sausages, skins removed
200ml/7fl oz white wine