Cut the chorizo into slices. Clean and wash spring onions and cut into fine rings. Peel garlic and chop finely. Cook pasta in 3-4 l boiling salted water (1 teaspoon salt per litre) according to package instructions.
Heat the oil in a large frying pan. Fry the chorizo for about 5 minutes while turning. Remove. Sauté the spring onions and garlic in the frying fat for about 2 minutes. Dust with flour and sauté for about 1 minute, stirring constantly.
Douse with red wine. Add the tomatoes. Bring to the boil and simmer for about 8 minutes, stirring continuously. Season to taste with salt, pepper and 1-2 teaspoons sugar.
Coarsely crumble feta. Pour the pasta into a sieve, drain and put it back into the pot. Warm the sausage in the sauce. Fold the sauce under the noodles. Arrange un