A creamy, savory black bean puree drenches enchiladas filled with queso fresco in this warming and hearty dish. Avocado leaf serves a similar purpose as a bay leaf—imparting deep flavor before being removed prior to serving, leaving a faint fennel-like flavor behind.
Black beans can be cooked up to 4 days in advance; bean puree can be made up to 2 days in advance. Cover and refrigerate both; thin bean puree with a splash of water if needed. Tortillas can be fried up to 4 hours in advance.