Pouteria campechiana, also known as the canistel, is an evergreen tree native to southern Mexico, Belize, Guatemala, and El Salvador. It is cultivated in its native countries and has been introduced into several other countries, including Brazil, Taiwan, and the United States. The edible part of the tree is its fruit, which is colloquially known as an egg fruit. The ripe fruit is used in jam and marmalade, on pancakes, and in a milkshake known as "eggfruit nog".
This picture shows a whole P. campechiana fruit.
See also: a cross section of the fruit.Photograph: Augustus Binu