(channeling Forest Gump) sauted, grilled, marinated, boiled, fried, deep fried, stir fried, coated and double deep fried, etc....
I've eaten a mushroom soup based on beef bone marrow slow cooked over a day. Yikes was it good.
Higher end resteraunts serve burgers from larger caps.
The dried ones from asian grocery stores are cheap and allow re-hydration in a broth of your choice. Whatever you make, mushrooms tend to be a bulky mass of tasteless gelatinous material at first.
Epicurious.com: Recipes, Menus, Cooking Articles & Food Guides or
Joy of Cooking Joy Kitchen or others is a start.