Heat three tablespoons of oil in a coated pan. Fry deep-frozen spring rolls for 15 minutes at medium heat, turning them over. In the meantime, wash and clean the tomatoes, cut them into slices and remove the seeds.
Peel and finely chop the onion. Wash the basil, pluck off the leaves as desired or cut into fine strips. Mix balsamic vinegar, salt, pepper and sugar. Beat the remaining oil into the mixture. Mix tomatoes, onion and basil strips with the marinade.
Arrange 1/2 spring roll with salad on plates. Roast sesame seeds in a dry pan and sprinkle over them. Garnish with basil.