"Tent foil" refers to a technique used when microwaving food, particularly baked dishes, to prevent the food from drying out or overcooking. Here's how to "tent foil" when microwaving: Take a small piece of aluminum foil, just large enough to lightly cover the top of the dish or food item you are microwaving. Loosely drape or "tent" the foil over the food, making sure it does not touch the...