Arepa (aˈɾepa) is a type of food made of ground maize dough stuffed with a filling, eaten in northern parts of South America since pre-Columbian times, and notable primarily in the cuisine of Colombia and Venezuela, but also present in Bolivia, Ecuador, and Panama. Initially, arepa flour was made by grinding maize at home. In the 1950s, precooked arepa flour was invented by Luis Caballero Mejías, a Venezuelan engineer, and became an instant success. Arepa is commonly eaten in those countries and can be served with accompaniments such as cheese, cuajada (fresh cheese), various types of meat, avocado, or diablito (deviled ham spread). It can also be split to make sandwiches. Sizes, maize types, and added ingredients vary based on preparation. It is similar to the Mexican gordita, the Salvadoran pupusa, the Ecuadorian tortilla de maíz, and the Panamanian tortilla or changa. The arepa is a pre-Columbian dish from the area that is now Colombia, Panama and Venezuela. Instruments used to make flour for the arepas, and the clay slabs on which they were cooked, were often found at archaeological sites in the area. Although it has not been specified in which country an arepa was cooked for the first time, it has been possible to define the oldest dates of the presence of maize in Colombia and Venezuela. For example, in Colombia, the first record of the existence of corn dates from about 3,000 years ago, while in Venezuela, the estimate is about 2,800 years ago. Throughout its history, the arepa has stayed mainly unchanged from the arepas that pre-Columbian native peoples would have consumed, making the arepa one of the few pre-contact traditions that have remained popular in the years since colonization. The name arepa is related to erepa, the word for 'cornbread' in the Cumanagoto language. The arepa is a flat, round, unleavened patty of soaked, ground kernels of maize, or—more frequently nowadays—maize meal or maize flour. It can be grilled, baked, fried, boiled, or steamed.