Cook spaghetti in plenty of boiling salted water for 8-10 minutes until firm
Meanwhile clean, wash and finely dice the vegetables. Peel and chop the onion and garlic and fry in hot oil. Steam the vegetables briefly
Stir in tomatoes and sour cream. Simmer for about 15 minutes, stirring frequently. Season to taste with salt, cayenne pepper and sugar. Wash herbs, chop finely and stir into the sauce. Drain the finished spaghetti well and serve with the sauce