Sweet potato fries are one of my favorite things to eat, and for a long time I wondered how I could transform them from a side dish into a full meal. The answer is to load them up with lots of fixings, including black beans, avocado and fresh vegetables, and then smother them with a creamy cashew-based queso sauce. The recipe for the sauce is worth doubling and keeping on hand: it’s delicious on baked potatoes, nachos, tostadas or Mexican rice. You can top the fries with any of your favorite nacho fixings, including hot sauce, salsa and pickled jalapeño chiles.