Onion filling and gravy

Salt the onions cut into thin circles and put them out in a grin, eat fat through a colander. Place the onion filling on a cake base (made from yeast dough) and bake the cake in an oven preheated to 200 degrees. Mix all gravy products. Pour the almost finished pie with the cooked egg cream mixture and put in the oven for a few more minutes, until rosy.