Dough: Make a kneading dough with flour, butter, salt, egg and water.
Filling: cut the onions into slices and fry them with the diced bacon in the lard; Mix the quark, eggs and cream vigorously. Mix in the sifted flour and then the onions and bacon and season the mixture with salt, pepper and garlic;
Use the dough to lay out a cake tin with a detachable ring, dia 26cm, prick the dough base with a fork. Put the filling in the tin, put the onion cake in the preheated oven.