Wash, clean and slice the tomatoes. Peel onions and cut into rings. Clean, wash and drain the rocket. Roast pine nuts in a pan without fat, take them out.
Season vinegar with salt, pepper and sugar, fold in 3 tablespoons of oil. Fold in pine nuts. Cut bread into long thin slices. Heat 3 tablespoons of oil in a large pan. Fry the bread until golden brown.
Mix tomatoes, onion, rocket and a little marinade. Arrange the tomato salad on plates. Slice parmesan and sprinkle over it. Add the rest of the marinade and bread.