Wash the meat and cut into small cubes. Season to taste.
Fry the fillet in vegetable oil until golden brown.
Put the potatoes to boil. Cook for 10 minutes, then drain, peel and cut into cubes. Put it with the meat in a baking dish.
Beat eggs with sour cream, season to taste and add chopped onions. Pour our casserole from the mixture.
Bake at 180 degrees until golden brown, about 30 minutes. Potato casserole with chicken ready.