Fry them in oil chopped ham and salo, add chopped mushrooms, pre-soaked for several hours in water, peeled and diced tomatoes. Stew until soft. Eggs are broken down with the cream, sprinkle with salt and pepper and a little before the pasta is ready, pour in the sauce of tomatoes and salo (should not boil), the butter and grated feta cheese are placed in well-drained spaghetti and top pour sauce.