1. Boil the farfalle in a slightly salted water for 10-11minutes
  2. Drain and, if you want, add a little butter or 1-2 tbs. olive oil.
  3. Stir in the vinegar, pesto, salt and pepper and add them to the pasta.
  4. Let the mixture cool down for at least 15 minutes and then add the tomatoes, mozzarella and the basil.