Wash the meat, dab dry and cut into strips. Add gyros spice and 4 tablespoons of oil, mix well. Cover and put in a cool place for about 2 hours. Clean, wash and cut the peppers into strips. Clean, wash and halve the pointed cabbage and cut it into strips. Peel, wash and slice the potatoes.
Wash rosemary, dab dry, put some aside for garnishing, chop the rest finely. Melt the fat in a saucepan. Add rosemary. Dust with flour and sauté while stirring. Add milk and 300 ml water bit by bit while stirring. Bring to the boil, stir in the stock, simmer for 5 minutes at low heat. Fry meat in a hot pan over high heat for 3-4 minutes. Remove the meat and fry the potatoes in the cooking fat for about 5 minutes until golden brown. Heat 1 tablespoon of oil in a second, large pan. Fry the bell peppers and pointed cabbage for about 5 minutes while turning. Season vegetables and sauce with salt and pepper. Cut the feta into cubes.
Remove the meat and fry the potatoes in the cooking fat for about 5 minutes until golden brown. Heat 1 tablespoon of oil in a second, large pan. Fry the bell peppers and pointed cabbage for about 5 minutes while turning. Season vegetables and sauce with salt and pepper. Cut the feta into cubes. Alternately layer potatoes, meat, pointed cabbage and paprika vegetables, feta and béchamel sauce in a greased casserole dish. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 30 minutes. Garnish with rosemary