No-Roll Enchiladas

Preheat the oven to 350 (F). Dice the onion, pepper, and tomato (if using). Spray the bottom of a casserole dish with cooking spray and lay down a tortilla (if your tortillas are smaller than your casserole, you can layer them -- but be sure the bottom of the dish is covered or it'll stick like crazy). Spread a layer of refried beans on the top of the tortilla(s) -- you may want to heat the beans first to make them spread more easily. Pour half of the salsa and half of the onions over the beans. Put another tortilla on top of this layer. Layer the black beans, green pepper, tomato (if using), and the rest of the salsa and onion on top of the tortilla(s). Put another tortilla on the top (your casserole should be pretty full by now). Pour the can of enchilada sauce over the whole thing and bake, covered, for about 35-45 minutes or until its hot and bubbly all the way through. Serve with sour cream (vegan or otherwise) or all by itself. This freezes extremely well.
Of course, you can fiddle with this and add or take away ingredients. Its a little different every time I make it, since I layer things differently. Experiment and enjoy!