Heat the olive oil in a large skillet. Add the oil to the skillet before placing it on the stove. Heat the oil over medium-high heat for one to two minutes. You can also use butter or another type of vegetable oil in place of the olive oil. Use a wok, if you have one available.
Egg whites help emulsify fats and water-based liquids in certain recipes. Emulsification is a process by which you mix two liquids that normally do not mix well together. Emulsification of fats allows you to mix them with water-based substances, which has important implications for cooking and for digestion. To emulsify fats, you need substances such as bile salts or other compounds that help connect the fat and water.
An emulsifier is a molecule in which one end likes to be in an oily environment and the other in a water environment. To make an oil-in-water emulsion, such as mayonnaise, droplets of oil molecules are surrounded by the oil-loving end of the emulsifier molecules.