Moosewood low-fat, pg 172. We made enough to feed an army! More or less 1.5x the recipe, except the spices which we doubled. Turned out that was a bad idea and it was a bit too spice heavy. We also used our frozen hatch chilies instead of jalapenos.
Steamed the sweet potatoes, made a giant pot of black beans, and mashed them together with a potato masher. Stuffed them in tortillas, froze most of them, baked ours while we were stuffing/freezing the lot.