To prepare aluminum foil facing for cooking, first, cut a piece of aluminum foil larger than the cooking surface. Clean the foil to remove any dust or debris. Lightly grease the foil with cooking spray or oil to prevent food from sticking. Fold the edges of the foil up to create a shallow tray, ensuring the sides are high enough to contain any juices. Place the foil on the cooking surface, and you're ready to cook. Always handle the foil with utensils when hot to avoid burns.