Tortilla Lasagna

Tortilla Lasanga- Found this on vegetarian times website. I was unsure of it but it was delicious!

6 8-inch fat-free flour tortillas
1 Tbs. olive oil
1 small onion, chopped (1 cup)
2 Tbs. chili powder
2 tsp. ancho chile powder (I used creole seasoning)
2 cloves garlic, minced (2 tsp.)
2 cups strained tomatoes, such as Pomì, divided
1 15-oz. can black beans, rinsed and drained, or 1 1/2 cups cooked black beans
2 medium zucchini, diced (1 1/2 cups)
1/2 cup fresh or frozen corn kernels
1 1/2 cups grated Monterey Jack or pepper Jack cheese

1. Preheat oven to 350°F. Toast tortillas on 2 baking sheets in oven 5 minutes, or until light brown, turning once. This is an important step so that the tortillas dont become soggy in the lasagna.

2. Heat oil in saucepan over medium heat. Add onion, and sauté 5 minutes, or until soft. Stir in chili powder, ancho chile powder, and garlic, and cook 30 seconds. Add 11/2 cups strained tomatoes, beans, zucchini, corn, and 1/2 cup water, and season with salt and pepper, if desired. Cover, and cook 10 minutes, or until chayote is tender.

3. Coat 2-inch-deep x 8-inch round baking dish with cooking spray. Spread 1/4 cup strained tomatoes in bottom of pan. Set 1 toasted tortilla in pan; top with 3/4 cup bean mixture and 1/4 cup cheese. Repeat layering 4 more times. Top with last tortilla, and spread remaining 1/4 cup strained tomatoes over top. Sprinkle with remaining 1/4 cup cheese. Bake 30 to 45 minutes, or until casserole is bubbly and cheese has melted. Let stand 10 minutes before cutting into 8 wedges.