The Pitaya has an ovoid shape, and a thick yellow skin with excrescences and bulges that end with spine. inside there's a great mass of dense translucent white flesh that contains a multitude of small edible black seeds that can be scooped out in neat easy spoonfuls giving off a pleasant fruity smell.
The flavor is a little like a melon, with a multitude of crunchy seeds, which don't get in the way or alter the taste but do have a tendency to explode nicely when chewed.
At times they are available in the local grocery stores but are incredibly expensive. $6 for ONE!
Pitayas are also referred to as fruit of the shipwrecked man of the desert because of its refreshing properties. It is preferable to consume after keeping it in the fridge as that permits the flavors to heighten resulting in an even more refreshing character. To eat Pitayas cut them in half and eat the flesh with a spoon. They can also be made into juice and enjoyed as a cool drink. A syrup made of the whole fruit is used to color pastries and candy.
Fresh Seeds available here