Clean, wash and slice the mushrooms. Peel and finely chop onion and garlic
Heat the oil. Sauté onion and garlic in it. Add mushrooms and fry briefly. Season with salt and pepper
Mix sour cream, eggs and 50 g grated parmesan, season. Put some of it into a greased casserole dish (approx. 21 x 27 cm). Then alternately layer lasagne dishes, peas, mushrooms, boiled ham and egg sour cream. Finish with lasagne and egg sour cream
Sprinkle breadcrumbs and 25 g Parmesan cheese over it. Bake lasagne in a preheated oven (electric cooker: 175 °C / fan oven: 150 °C / gas: level 2) for approx. 45 minutes. 15 minutes before the end of the baking time, spread butter in flakes over the lasagne. Wash and chop the parsley and sprinkle over it