Bananas halve across and then in length, arranged next to each another in a greased with butter form, put some melted butter, top distributed compote of blueberries and dusted with crushed hazelnuts. Dessert bake in preheated oven 10-15 minutes at a moderate temperature. When baking banana can be covered with 2 egg whites broken down into snow with 80 g of powdered sugar (optional).