Amounts are flexible depending on how many you want to feed, so I'll just give the basic idea. Grill some onions and mushrooms until tender, and put into a casserole dish. Use boneless, skinless chicken breasts. Dredge them in flour, egg wash and bread crumbs and lightly brown both sides in butter. Place them on top of the mushrooms and onions. Cover them with a layer of Mozzarella, Monteray Jack and Parmesian cheeses, then pour on enough marinara sauce to cover. Bake at 350 for 30 minutes or so, until the chicken is tender and all the cheeses are melted. It's easy to make a big batch so as to have leftovers or to freeze for later.