Wash the tomatoes. Clean the garlic, onion and tomatoes. Dice onion and garlic. Cut tomatoes roughly into cubes. Heat 1 teaspoon of oil in a saucepan, fry the onion and garlic cubes until translucent and add the diced tomatoes. Add 1 teaspoon of sugar and broth and bring to the boil once. Place a large fine hair sieve on a bowl, carefully scoop in the tomato mixture and drain slowly (approx. 30 minutes).
In the meantime clean the rest of the vegetables. Wash the peppers, zucchini and eggplant. Cut out balls from the yellow zucchini with a ball cutter. Cut the rest of the vegetables into fine cubes. Heat 1 teaspoon of oil in a saucepan and sauté the vegetables briefly. Add tomato stock, season with salt and pepper. Chill for 1 hour and garnish with rosemary