"Tree Tomato," is also the original name of the Tamarillo so that's curious that the name is also used for such a mixture.
Recently, at a Peruvian restaurant, I had an ice cream made from the lucuma fruit, which is in the same family as mamey and it was quite nice. '
Edited to add that this article (which has an annoying amount of ads) about a shop making Peruvian ice creams mentions mamey:
QuoteMamey, which has a flavor similar to pumpkin, almond and sweet potato.