Cut the chicken from one of the trays into pieces and arrange them at the bottom of a pot without oil. Chop the onions, fry and add them to the meat. Grate the cheese and cover the meat with half of it.
Chop and arrange the fillets from the second tray, then cover with the remaining cheese. Beat the eggs with the milk and mayonnaise, pour them into the pot and put it to bake until you get a golden tan.