Bocoles (Masa and Black Bean Cakes) with Spicy Yams – Recipe

Bocoloes are little pan-fried cake of masa and mashed black beans, typically served as an (appetizer). I learned about them from Diana Kennedy's magnificient My Mexico and thought that I could replace the pork filling with yams, increase the portion, and make an unusual and delicious vegetarian entree.
The cakes came out great; they …