Peel and finely chop the onion. Heat 1 tablespoon of oil, fry onion in it. Add tomato paste and sauté briefly. Chop the tomatoes coarsely, add and simmer for about 10 minutes at low heat. Prepare pasta in boiling salted water according to package instructions. 2-3 minutes before the end of the cooking time, add peas to the boiling water and cook along. Wash the pike-perch, dab dry and cut into pieces.
Heat 2 tablespoons of oil and fry pike-perch on each side for about 3 minutes. Season with salt and pepper. Drain the noodles and let them drain. Pour cream to the tomatoes, season with salt, pepper and sugar. Arrange on plates and serve garnished with dill