Peel, wash and halve the potatoes. Heat 3 tablespoons of oil in a pan. Fry the potatoes in it at medium heat for about 15 minutes. Turn from time to time. Season with salt, pepper and rosemary.
Peel and halve the onion, dice 1 half and cut the other half into 8 slices. Peel garlic and chop finely. Wash and halve the chilli and remove the seeds. Cut the chillies into rings. Knead minced meat, diced onion, garlic, chili, egg yolk and quark.
Season with salt and pepper. Form 8 oval meatballs from the minced meat mixture and press 1 onion wedge each in the middle. Heat 2 tablespoons of oil in a pan. Fry the meatballs in it at medium heat for about 12 minutes.
Turn it over once in a while. Clean, wash and cut the peppers into pieces. Heat 2 tablespoons of oil in a saucepan. Brown the peppers in it, season with salt and pepper, add some water and steam for 8 minutes.
Arrange potatoes, meatballs and vegetables on plates. Serve garnished with rosemary.