Wash the meat and pat dry. Cut in half and possibly tap flat. Clean mushrooms, wash if necessary and halve depending on size. Peel onions and cut into rings
Heat 1-2 tablespoons of oil in a wide frying pan. Fry the mushrooms until all the liquid has evaporated
Add the peas and sauté briefly. Deglaze with approx. 3/8 l water, bring to the boil. Stir in stock. Simmer for about 3 minutes. Stir in the sauce thickener, continue to simmer for about 1 minute. Season with salt and pepper
Heat 2 tablespoons of oil in a second pan. Fry the meat for about 3 minutes on each side. Add onions and fry until golden brown. Season with salt, pepper and paprika. Take out
Wash the lemon, cut into slices and toss briefly in the cooking fat. Arrange everything with lemon and parsley. Boiled potatoes or white bread taste good with it