Prepare enchiladas: Place corn tortillas on flat surface. Fill with about 1/2 cup of the butternut squash black bean mixture. Sprinkle on about 2 tablespoons of cheese, if using. Gently roll and place seam side down in baking dish. Repeat with remaining tortillas – you should have enough for 8 tortillas.
If you have extras, no worries. The mixture makes a great power bowl filling. Cover enchiladas with the remaining sauce.