Clean, wash and chop the tomatoes. Finely chop the onion half. Rinse cutlet meat cold, dab dry and cut into strips. Fry the onion cubes and escalope strips in hot oil. Add tomatoes.
Season with salt, pepper and the herbs and braise at medium heat for about 10 minutes. Cook pasta in boiling salted water for 8-10 minutes. Drain, rinse cold and drain well. Stir sour cream into the sauce shortly before the end of cooking time. Arrange on a plate and garnish with fresh herbs if necessary