Peel and slice the onion. Wash the meat and dab dry. Heat 1 teaspoon of oil in a coated pan. Cut meat into three pieces, season with salt and pepper and fry in the pan for 2-3 minutes on each side.
Heat 1 teaspoon of oil in a small pot. Sweat curry powder in it for about 2 minutes under low heat. Deglaze with milk and stock, bring to the boil, stir in sauce thickener and simmer for 1-2 minutes.
Drain the meat on kitchen paper. Put the onion in the pan and fry for 2-3 minutes, turning. Season to taste with salt and pepper. Remove the hard stalk and outer leaves from the cabbage.
Cut the cabbage into strips and stew it in a pot with little water for about 5 minutes until soft. Put meat, onion and cabbage in a small casserole dish, pour sauce over it and sprinkle with cheese. Grill under the preheated grill for 3-4 minutes until golden brown.
Remove and garnish with marjoram.