Peel onion and garlic. Chop the onion finely. Chop garlic finely. Heat oil in a pan and fry minced meat in it until crumbly. Clean, wash and dry aubergines, cut them in half crosswise and cut strips into the skin with a knife.
Hollow out the aubergines with a ball cutter or a teaspoon. Coarsely chop the flesh and add to the mince. Fry briefly. Season everything with salt and pepper. Wash and dry the tomatoes and cut off the tops.
Hollow out the tomatoes. Fill the tomatoes and eggplants with the chopped mass and place them in a greased fat pan of the oven. Finely dice the mozzarella. Grate parmesan. Sprinkle the vegetables with cheese and bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 20-25 minutes.
In the meantime, caramelize brown sugar in a pan. Deglaze with vinegar and simmer for 3-4 minutes. Clean the rocket, wash and pat dry. Arrange vegetables on a bed of rocket and drizzle with balsamic sauce.