Fry the minced meat in a little oil and season with a little salt and pepper. Mix the minced meat with onions, garlic, leek, broth, mustard, tomato paste and sour cream and season well with salt, pepper and paprika powder.
Grease 2 casserole dishes with oil and press in the dumpling dough. Spread the minced meat mixture on top and sprinkle with the cheese. Cook in the oven at 200 ° C for 1 hour.