Clean, wash, quarter and seed the tomatoes. Cut the flesh into small cubes. Peel and finely chop onion and garlic. Wash, pluck and finely chop the basil. Mix prepared ingredients and season with salt and pepper. Cut bread into 8 slices and sprinkle with 2 tablespoons of olive oil. Roast in a preheated oven (electric cooker: 200 °C/ gas: level 3) until crispy, remove.
Drain mozzarella and cut into 8 slices. Cut them in half lengthwise. Whisk egg, season. Turn the sticks in the flour, then in the beaten egg and finally in the breadcrumbs, press down well. Fry the sticks in 2-3 tablespoons of hot oil over high heat for 1-2 minutes, turning them golden brown. Spread the tomato mixture on the bread. Serve with lettuce and fresh basil as desired