Defrost the peas. Clean, wash and halve the mushrooms. Wash cutlets, dab dry and tap flatter. Peel onion, cut into rings. Heat the fat. Fry the mushrooms for about 5 minutes, turning them and adding the peas.
Season with salt and pepper. Deglaze with stock, bring to the boil briefly. Add sauce thickener, season to taste again. Fry the escalopes and onion rings in hot oil, turning for about 4 minutes. Season with salt, pepper, paprika and a few drops of lemon juice.
Wash and chop the parsley. Arrange the schnitzel and vegetables sprinkled with parsley. Serve garnished with lemon. Delicious with baguette.