Fish fillets cut into portions. Onions and garlic finely. Lemon cut into thin slices. Peel the potatoes and cut into thin circles also. In baking pan lining products so - half onion, fish, lemon slices, garlic, half onion, sliced ​​tomatoes, potatoes, chopped spinach. Sprinkle with olive oil, salt and pepper. Bake with a lid or foil 220 C 40-45 minutes. Five minutes before being pulled from the oven removable lid and bake so.