Fry finely chopped onions and grated carrots in a pan with vegetable oil for 1-2 minutes.
Add mashed tomatoes, salt and sugar. Simmer over low heat for 3-4 minutes.
Place in a blender bowl and beat well.
Fry flour in a dry frying pan.
Add chopped vegetables and mix well. Just warm it up.
Boil pasta, season with butter.
Put the pasta and sauce on a dish. And serve to the table.