Coming out of a school in Cobán, that is how most stories seem to start lately, there was a man eating what looked like an avocado. Same exclamation followed by same question: Buenas, como esta! Ala que es es eso? (Hello, How are you! What is it?)
Answer: Koyow. My interpretation a poor man's avocado. Similar look (more primitive), similar consistency (less smooth), taste mmm (bla). He gave it to me, said have it and advice me to eat it with lime and chile de Cobán (kind of cayenne pepper).