Wash hands with warm, soapy water for 20 seconds.
Preheat oven to 350°F.
Spray 2 9x13-inch baking dishes with nonstick spray.
In a large skillet or electric skillet, heat oil. If greens are fresh or frozen, heat in the skillet until wilted (for fresh) or no longer frozen.
Drain beans, tomatoes, and corn. Add beans, tomatoes, corn, and seasonings to skillet. Heat through.
Divide mixture between tortillas, filling each tortilla with 1/3-1/2 cup of the filling.
Sprinkle cheese over the filling.
Roll up tortillas and place seam-side down in the baking dishes.
Cover with enchilada sauce.
Cover with foil and bake for 20 minutes, until heated through. Remove foil, top with additional cheese, if desired, and bake for 5 more minutes.
Serve with toppings. Freeze 1 pan of enchiladas for a quick dinner another day.