Peel and finely dice the onions and garlic. Set aside 1/3 of the onions. Wash the tomatoes, scratch the skin crosswise with a knife. Blanch the tomatoes in boiling water for about 1 minute. Remove and rinse in cold water. Peel the skin. Dice tomatoes roughly
Heat 3 tablespoons of oil in a large saucepan and sauté the onions and garlic. Add tomato paste and sauté briefly. Add tomatoes, season with salt, pepper and sugar. Let everything simmer for about 45 minutes. Clean, wash and dice the peppers
Drain the mozzarella and cut into cubes. Soak the rolls in cold water. Squeeze the bread rolls. Knead the minced meat, bread roll, diced onion and egg. Season with salt and pepper. Shape about 10 dumplings with moistened hands, pressing 1-2 mozzarella cubes each into the middle. Heat 2 tablespoons of oil in a large frying pan. Fry the meatballs lightly while turning. Using a skimmer, lift them out of the frying fat, drain them briefly and add them to the tomato sauce. Let them simmer for about 15 minutes at low heat.
Prepare rice in boiling salted water according to package instructions. Heat 1 tablespoon of oil, add paprika and fry over a mild heat for about 5 minutes, season with salt and pepper. Drain rice, drain well and mix with paprika. Add capers to the sauce, season everything again. Wash parsley, shake dry. Pluck off leaves and chop finely. Arrange everything and serve sprinkled with parsley