Mexican Black Bean Lasagna

Heat oven to 425 °F. Heat the oil in a large skillet over medium heat. Add the onion and cook, covered, stirring occasionally, for 5 minutes. Add the jalapeños, bell pepper and garlic and cook, covered, stirring occasionally, until the vegetables are just tender, 6 to 8 minutes. Stir in the beans, corn and chili powder and cook for 2 minutes. Stir in the lime juice and cilantro. Spread 1/2 cup enchilada sauce on the bottom of an 8-in. square or 1 1/2-qt baking dish. Top with 3 tortillas, tearing them to fit as necessary. Spread a third of the remaining enchilada sauce over the top (about 1/2 cup). Top with a third of the bean mixture and 1/2 cup cheese; repeat twice. Bake until the lasagna is heated through and the top is beginning to brown, 12 to 15 minutes. Let stand for 5 minutes. Serve with cilantro, lime wedges, sour cream and hot sauce, if desired.