Portobello mushrooms, kale, and black beans are layered with tortillas and melty pepper jack cheese in this vegetarian main dish.
Once the skillet is hot, add grapeseed oil and red onion and cook, stirring occasionally with a wooden spoon, 5 minutes, or until onions are translucent. Stir in garlic, cumin, chili powder, coriander, smoked paprika, and salt and pepper. Cook 2 minutes, or until mixture is aromatic. Add more oil as needed throughout the cooking process to prevent food from sticking to the pan.
Coat the bottom of an 8-inch by 11-inch glass or ceramic baking dish with sauce from the vegetable mixture. Spread a third of the corn tortilla pieces (8 tortilla halves per layer) on top of the sauce. Cover with a third of the vegetable mixture and shredded cheese. Repeat until baking dish is full.
Place baking dish on the center rack of the oven and bake 20 minutes, or until cheese is browned and tortillas are crisp around the edges. Remove from oven and garnish with cilantro (if using). Allow dish to cool 5 minutes before slicing into pieces and serving.
Vegan variation: Omit cheese or substitute ¾ cup nutritional yeast.