Onion peel, cut, fry until Golden brown. Spread half of the onion in a plate, in the second half, put the stuffing, fry, there also add the mushrooms (I chanterelles), a little more stew.

Peeled potatoes boil, add the butter, make a puree, add fried onion, egg. I got a little watery, I added flour.

From sour cream, mayonnaise and ketchup make the sauce, add the garlic, mix well.

The form in which to bake, a little oil, sprinkle with breadcrumbs. Spread 1 layer mashed potatoes, then lubricated with the sauce, on the sauce - beef with mushrooms and onions, again with mashed potatoes, gravy, stuffing with onions and mushrooms, spread on top of mashed potatoes again. Grease with the sauce and put in oven for 15 minutes.

Cheese grate on a coarse grater, to get our casserole, place cheese and again bake it in the oven, for 5-10 minutes before baking cheese. Here's zapekanka happened. Bon appetit!!!