A deviled egg is a popular appetizer made from hard-boiled eggs. The eggs are cooked, peeled, and then cut in half. The yolks are removed and mixed with ingredients like mayonnaise, mustard, and spices before being spooned or piped back into the egg whites. Deviled eggs are often garnished with paprika, herbs, or other toppings for added flavor and presentation. They are commonly served at parties, picnics, and holiday gatherings, making them a favorite finger food for many occasions.