Preheat the oven to Gas Mark 4, 180°C (350°F). Season the hake with a little salt and pepper and place in a single layer in a buttered baking dish. Sprinkle over the parsley. Heat the butter in a saucepan over a medium heat and sauté the onion for a couple of minutes. Turn down the heat if it begins to brown. Add in the mushrooms and lemon juice and cook for five minutes, stirring occasionally. Stir in the flour and allow to cook for a minute or two then blend in the milk and cream. Increase the heat and simmer the sauce for a couple of minutes, stirring all the time. Season to taste. Pour the sauce over the fish, then sprinkle on the breadcrumbs, grated cheese and paprika. Bake in the preheated oven for 18-20 minutes.
Wholemeal bread and steamed broccoli