Yuca croquettes are boiled cassava mashed into a dough, breaded and fried until crisp outside and soft in the middle. They can be plain or stuffed with cheese. The one rule that decides the result: let the yuca cool completely before mashing it, or the dough turns gummy. Makes about ten.
Choose firm cassava with clean white flesh. Reject roots with grey or black streaks running through them, or with a woody, stringy texture: they are past their best and boiling will not fix them. Frozen yuca sidesteps the problem and comes peeled and cored.