Remove the stems from the mushrooms, use a spoon to scoop out the gills, and slightly hollow out the inside of the cap. Finely chop the onion and sauté it together with the chopped stems and the scooped-out mushroom interior in butter. Add the chopped prosciutto, then season with salt to taste. Transfer everything to a bowl, add the cream cheese and parsley, mix well, and fill the mushroom caps with this mixture. Place them in a baking dish and top each mushroom with some grated cheese and/or mozzarella.

Bake for 30 minutes at 180°C.

You can watch the full preparation process in the cooking show Kuhinja izzivov.

Enjoy your meal!