The primary ingredient in a frittata is eggs. A frittata is a traditional Italian dish that resembles an omelette but is typically thicker and often includes a variety of additional ingredients such as vegetables, meats, and cheeses. To prepare, eggs are beaten and then combined with the chosen fillings before being cooked slowly on the stovetop and often finished in the oven. This cooking method allows for the dish to set evenly and develop a rich flavor profile. Frittatas are versatile and can be enjoyed for breakfast, lunch, or dinner, served hot or cold.