Hazırlanışı
1Cut the top one-third off the onions, squashes, tomatoes, eggplants, and peppers, and set aside to use as caps. Cut the zucchini in half lengthwise. With a melon baller or an espresso spoon, scoop out the inside of each vegetable the best you can. Leave the walls about 1/4 inch (6 mm) thick. Set the vegetables aside.
2Preheat the oven to 400°F (200°C). To make the stuffing, in a small frying pan, sweat the onion in the oil over medium heat for 4 to 5 minutes, or until translucent. Remove from the heat.
3In a bowl, combine the veal, pork, cooked onion, egg, bread, Parmesan, thyme, fennel seeds, garlic, chile flakes, and a pinch each of salt and pepper. Mix together using your hands; it should have the texture of a raw meatball.