Cleaning vine tomatoes. Score tomatoes crosswise and rinse with hot water and peel the skin. Cut tomatoes in half, remove seeds and dice. Cut peppers into quarters, clean, wash and dice. Wash and clean the cucumber and cut into fine cubes. Soak toast.
Put vegetable cubes, except some for garnishing, in a large pot. Add olive oil, vinegar, broth and squeezed toast, puree everything. Season to taste with salt, pepper, sugar and lemon juice. Chill the soup for about 1 hour. Garnish with remaining vegetable cubes and thyme. Sprinkle with coarse pepper