Method Grease ovenproof dish and spoon in cooked rice. Drain fish, break into chunks and place on rice. For mornay sauce, melt butter in saucepan, stir in flour then gradually add milk. Stir until sauce boils and thickens. Add grated cheese, salt and pepper, stirring until smooth. Pour mornay over fish, sprinkle with extra cheese and breadcrumbs. Bake in moderate oven for 20 minutes until hot and golden. In last five minutes of cooking time, place pineapple slices in separate dish and thoroughly warm. Serve with warm pineapple slices and green peas.