Clean and wash the broccoli and cut it into small florets. Clean, wash and cut the peppers into strips. Leek onions clean, wash and cut into fine rings.
Preheat oven (electric cooker: 150 °C/circulating air: 130 °C/gas: see manufacturer). Peel and finely dice onion and garlic. Peel ginger and grate finely. Knead minced meat, quark, onion, garlic and ginger well. Season with approx. 1 tsp salt and 1⁄2 tsp pepper. Form approx. 16 balls from the mixture. Heat the oil in a large pan (with lid). Fry the meatballs for about 4 minutes, take them out and put them on a baking tray. Finish cooking in a hot oven for about 10 minutes.
Cover the broccoli and peppers and fry in hot frying fat for 4-5 minutes. Turn in between. Wash the limes in hot water and dry. Halve and squeeze 1 lime, cut 1 into slices. Peel mango, remove flesh from stone and cut into slices. Deglaze vegetables with soy sauce and lime juice. Fold in mango slices, warm up briefly. Season with pepper.
Arrange vegetables and meatballs and sprinkle with spring onions and sesame seeds. Garnish with lime wedges and coriander.