If a recipe calls for multiple cloves of garlic at once (chicken with 40 cloves of garlic?), put the cloves in a small resealable bag and hit the bag lightly with a jar or onto a hard surface. The peels will loosen right up. You can also microwave the cloves (not in a bag) for 10 to 15 seconds if the skins are especially tough to remove.
— From Cook and Pollack, Casserole Queens Make a Meal Cookbook
