2 tsp olive oil
11⁄2 cups chopped onion
1 lb zucchini, diced (about 3 cups)
21⁄2 tsp ground cumin
1 can (14.5 oz) diced tomatoes with chiles (Rotel), drained
1 can (15 oz) black beans, rinsed and drained
1 can (11 oz) corn, drained
1 can (10 oz) mild enchilada sauce (or make your own!)
1⁄2 cup chopped cilantro
5 (8-in.) whole-wheat flour tortillas
11⁄4 cups shredded reduced-fat cheddar
Garnish: reduced-fat sour cream
Heat oven to 400ºF. Coat a 3-qt round baking dish with nonstick spray.
Heat oil in a large nonstick skillet over medium-high heat. Add onion and sauté 5 minutes. Add zucchini and cumin, and sauté 5 minutes or until zucchini is crisp-tender. Stir in tomatoes, beans, corn and enchilada sauce; bring to a simmer. Remove from heat and stir in cilantro.
Put 1 tortilla in baking dish. Top with 11⁄2 cups zucchini mixture; sprinkle with 1⁄4 cup cheese. Repeat layers 4 times.
Cover with foil and bake 20 to 25 minutes until bubbly around edges and cheese is melted. Cool 5 minutes. Cut into wedges and serve with sour cream, if desired.