Frittata is an egg-based dish similar to an omelette or quiche, either simple or enriched with additional ingredients such as meats, cheeses, vegetables or pasta. It may be flavored with herbs. Frittata preparation differs from omelette preparation in that the eggs are beaten to incorporate air where the eggs for omelettes usually are stirred with less air incorporated. The additional air in the frittata mixture allows for a deeper filling and a fluffier result. Ingredients to be incorporated into a fritatta are added to the pan before the egg mixture (in a French omelette they are added after). A frittata is usually served in radial slices like a pizza.