Omelette or omelet is a preparation of beaten egg cooked with butter or oil in a frying pan, often folded around a filling. Many variations exist.

• Spanish tortilla de patatas (European Spanish for "omelette and potatoes") is a characteristic thick omelette stuffed with fried potatoes and fine cut onion, and fried using olive oil.

• Western omelet is an omelette filled with diced ham, onions, and green bell peppers.

• Spanish omelet is an omelette served with an often spicy sauce of tomatoes, onions, and peppers.