Wash meat, pat dry. Clean and wash the peppers and cut into pieces. Peel and roughly dice the onions.
Fry the schnitzel on both sides in 2 tablespoons of hot oil in a large pan. Season with salt and pepper, remove. Fry the onions and peppers in the frying fat. Sweat the flour in it. Stir in the water, sour cream and broth. Bring to the boil and simmer for about 5 minutes.
Wash oregano and chop except for a little. Stir into the sauce. Season to taste with salt, pepper and paprika.
Place the schnitzel in a greased baking dish (approx. 30 cm long). Pour sauce over it, rub cheese over it. Bake in a hot oven (electric stove: 225 ° C / convection: 200 ° C / gas: level 4) for about 15 minutes, garnish.
Rice or spaetzle and a cold beer go well with this.