Plums halve and pit them. Apples and pears are cut into thin slices. The fruits are arranged in a baking dish in which melted the butter and baked for about 20 minutes. Eggs with sugar is broken down into a thick foam, gradually add the melted margarine and flour mixed with baking powder. Pour dough on cold fruit. Bake in a moderate oven. Remove the cake turned onto a plate and garnish with whipped cream.