The best way to use aluminum foil facing for cooking is to preheat your oven and ensure the foil is shiny side up to reflect heat. For baking, create a tent with the foil to protect delicate foods from direct heat, which can prevent burning. When roasting, use foil to wrap foods like fish or vegetables to steam them, enhancing flavor and moisture retention. For grilling, use foil to create packets to cook foods indirectly or to line the grill to prevent food from sticking. Always handle with care to avoid tearing and ensure even heat distribution.