Peel and finely dice the onion and garlic. Heat 2 tablespoons of oil in a saucepan. Sauté onion and garlic in it. Add tomato paste and steam briefly. Deglaze with tomatoes and vinegar, season with salt, pepper and sugar. Simmer covered for about 5 minutes, season again
Wash the meat, dab dry, cut into 4-5 pieces each and beat flat between 2 layers of foil. Grate cheese, mix with breadcrumbs, up to approx. 25 g for sprinkling. Whisk eggs in a deep plate, season with salt and pepper. Turn meat one after the other in flour, egg and cheese mixture and press on a little. Heat 3 tablespoons of oil in 2 pans. Fry the escalopes for 1-2 minutes on each side
Wash basil, shake dry, except for a little to garnish, pluck leaves from the stems, chop and stir into the sauce. Arrange piccati and tomato sauce on plates. You can taste pasta