We cut the champignons into medium cubes, if we leave the small ones as they are. Fry in a dry frying pan for 5-6 minutes. If there is a gas burner, then literally 30 seconds to process from above. We cut the garlic. Add butter. Add garlic. Fry for another 3-4 minutes until golden brown. Add topping. Another 2 minutes for the mushrooms to caramelize. Lay out on a plate. Sprinkle with sesame seeds to serve. Appetizers are good, both hot and cold.