'Tis the season for leftovers, and there's no better way to bundle up your leftovers than in a batch of quick and easy enchiladas. I used leftover pumpkin puree and leftover brown rice to make these vegetarian enchiladas for lunch on the day after our Canadian Thanksgiving feast. If you have a few slices of turkey, shred them up a bit and tuck them inside. Stuffing and mashed potatoes instead of brown rice? Go for it. Corn tortillas instead of whole wheat? Yes, indeed. Top the whole pan with red or green enchilada sauce from the pantry, and plenty of cheese, and nobody will complain about having to eat leftovers.