pinch ground coriander
2 large onions, peeled and sliced
陆 tsp pepper
mustard
salt and freshly ground black pepper
1 tsp cornflour
freshly grated nutmeg
1 tbsp olive oil
陆 tsp salt
25g/1oz unsalted butter
2 free-range egg whites
4 tbsp frozen milk
250g/9oz lean pork mince
brioche rolls