Serves: 4
Preparation time: 10 minutes
Cooking time: 35 minutes
Preheat the oven to 170C (340F, Gas 4). Melt half the butter in a frying pan and sauté the onions and mushrooms until soft. Transfer to a bowl and mix in the breadcrumbs, prawns and two thirds of the cheese. Divide the prawn filling between the sole fillets and roll up. Place seam side down in a single layer in a buttered shallow baking dish. Melt the rest of the butter, mix it with the lemon juice and drizzle over the fillets. Season with salt and pepper. Bake for 20 minutes.
Remove from the oven and sprinkle with the remaining cheese, then the chopped parsley and the paprika. Return the dish to the oven for about 10 minutes, when the cheese will have been melted. Serve with plain vegetables and a salad.