I like most 'shrooms gently fried in butter rather than Olive Oil. I would also try them "straight" before adding any garlic. Good wholemeal bread, gently toasted...
Fresh mushrooms are at a premium here (Crete at the moment) but we were chatting to a friend who has a fresh veg shop here and somebody refused to buy fresh mushrooms (which look lovely!) because she wanted canned... (bleurghhhh!!!)