Cook the potatoes in salt water for about 20 minutes. Cut broccoli into florets and cook in boiling salted water for about 12 minutes. Cut carrots into cubes of about 1 cm and add to the broccoli after about 6 minutes. Wash the cutlets and dab dry. Heat oil and fry escalopes for 1 minute on each side. Season with salt and pepper and put aside.
Cut mushrooms into slices and fry them in the frying fat. Cut spring onions into rings, sauté briefly with the mushrooms, season with salt and pepper. Spread mushroom vegetables and mozzarella slices on the escalopes. Add vegetable stock to the frying stock, thicken and season. Bake the escalopes in a preheated oven (electric range: 225 ° C/ gas: level 4) for approx. 5 minutes. Serve with vegetables and sauce