Wow! Until I read your post, I never heard of chayote. But a quick Google search has taught me that I can buy it from my local Tesco supermarket...

Description
Chayote
Harvested by Hand A versatile squash that can be eaten raw or cooked. Our Chayote comes from trusted growers in Costa Rica. Grown in carefully tended fields where they are harvested by hand and specially selected for its smooth texture. [Cite]

I don't really want them to specially select smooth ones. Because I like the authentic look of the chayote in your photo.

Anyway, I'm really looking forward to trying your recipe and tasting something new.

!BBH