Wash the fish fillet and dab dry. Divide into 3 pieces. Sprinkle with lemon juice and season with salt. Mix parmesan and egg white. Turn the fish pieces first in the flour, then in the egg white-cheese foam.
Fry in hot oil while turning for 6-8 minutes. Cook the pasta in boiling salted water for about 10 minutes. For the sauce, wash the tomatoes and remove the stalk. Dice the tomatoes finely and let them boil down in the stock for 5 minutes.
Season to taste with salt and pepper. Serve everything garnished with lemon wedges and herbs. Cucumber salad tastes good with it.