Mexican Lasagna

INGREDIENTS

• 1/2 red onion, chopped
• 3 tablespoons extra-virgin olive oil
• 2 pounds ground chicken breast, available in the packaged meats case
• 8 (8 inch) spinach flour tortillas, available on dairy aisle of market
• 1 cup medium heat taco sauce or 1 (14-oz) can stewed or fire roasted tomatoes
• 2 tablespoons chili powder
• 2 1/2 cups shredded Cheddar or shredded pepper jack
• 1 cup frozen corn kernels
• 2 teaspoons ground cumin
• Salt
• 2 scallions, finely chopped
• 1 (15-ounce) can black beans, drained