Wash, clean, quarter and seed the tomatoes. Cut the flesh into small cubes. Peel carrots and onion, clean celery. Cut prepared vegetables and bacon into small cubes.
Fry the slices of bread briefly on each side in 1 tablespoon of hot olive oil. Wash the chicken fillets and pat them dry. Cut into flat slices and beat them a little flatter. Heat 1-2 tablespoons of olive oil.
Fry the chicken escalopes for 2-3 minutes on each side. Season with salt and pepper and remove. Heat 1 tablespoon of olive oil in the frying fat. Fry bacon and onion cubes briefly. Add remaining vegetables and fry for another 2 minutes.
Deglaze with stock and tomato juice, season with salt and pepper and boil down for about 3 minutes at high heat. Wash, chop and stir in the basil and season to taste again. Pour half of the sauce into an ovenproof dish.
Place the bread and schnitzel in flakes. Drizzle with remaining sauce. Cut mozzarella into slices and spread on top. Bake in the preheated oven (electric range: 225 °C/ convection oven: 200 °C/ gas: level 4) for 5-8 minutes.
Garnish with fresh basil.