Wash the meat, dab dry and dice. Heat 3 tablespoons of oil in a casserole dish. Brown the meat thoroughly. Season with salt and pepper. Deglaze with 300 ml water, bring to the boil. Cover and stew for about 30 minutes.
For the spice paste peel and chop 2 onions, garlic and ginger. Crush or puree with cumin and cinnamon in a mortar. Wash and dice the tomatoes. Wash and chop the coriander and mint.
Cook the rice in boiling salted water for about 5 minutes. Pour off. Peel, wash and finely dice potatoes. Heat 2 tablespoons of oil in a frying pan. Brown the potatoes for about 5 minutes. Season with salt and pepper.
Take it off the stove.
Peel 2 onions and cut into rings. Fry them crisply in 1 tablespoon of hot oil. Stir the spice paste, tomatoes, coriander and mint into the meat. Mix potatoes, half onion rings, cardamom and rice.
Spread on the meat. Sprinkle with turmeric and remaining onion rings.
Dissolve the stock in 200 ml of hot water and pour over it. Cover and bake in a hot oven (electric range: 225 °C/circulating air: 200 °C/gas: level 4) for approx. 15 minutes. Turn down the temperature (electric oven: 200 °C/circulating air: 175 °C/gas: level 3) and continue baking for approx. 25 minutes.
Serve, garnish with mint. Drink tip: beer, e.g. lager.