Cut the rolls into 1 cm thick slices. Finely dice the bacon. Peel and chop the onion. Fry the bacon and fry the onions until soft. Wash and finely chop the parsley. Coarsely grate the cheese.
Layer alternately rolls, bacon and onions, cheese and parsley in a buttered casserole dish. The last layer is cheese.
Mix the cream with milk, eggs and quark and season with salt and pepper. Pour over the casserole.
Place in the oven preheated to 200 ° C and bake for about 30 minutes until the crust is nice and brown on top.