1.
Dice finely the onion and braise in hot oil. Add basil.
2.
Peel and dice the tomato and add to the onion. Add salt and pepper according to taste and, after a few minutes, add 2 spoons of sour cream. Simmer and, when the sauce thickens, remove from fire and grate cheese into it.
3.
Boil the pasta in salty water, drain and mix with the tomato and sour cream composition.
4.
Serve with cubes of feta cheese on top of each portion. Grate some more cheese on top after taste.
