The main ingredient of traditional paella is rice. Usually, a specific short-grain variety called "Bomba" is preferred due to its ability to absorb flavors while remaining firm. Paella originated in the Valencia region of Spain and can include a variety of ingredients such as seafood, chicken, rabbit, and vegetables, often flavored with saffron to give it a characteristic color and aroma. The cooking method is also crucial, typically prepared in a wide, shallow pan, allowing for even cooking and the development of a crispy bottom layer known as "socarrat."