This fast method requires ingredients to be cut up into smaller sizes. The pan should be heated first and then a small amount of oil added to the hot pan for about 30 seconds before you add the ingredients and continue to cook over a high heat. A wok is best as the deep sides ensure the food stays inside the pan while it is being tossed around. Its best to keep the food stirred or tossed regularly during the process to ensure it is evenly cooked. Stir fry dishes often include a variety of ingredients so those that require the longest cooking time are put in the pan first