Beat eggs, sugar, sifted flour with baking powder and vanilla. It's nice not to produce very thick dough. Melted sugar to obtain a slightly dark caramel, which put on the bottom of a buttered baking dish or cake pan. On caramel arrange random pieces butter (can be without them). Top put slices of fruit compotes pour cake mixes. Bake in a preheated 180C oven. As a bake turn into another tray or large plate and syrup with the juice of the compote.