In a large nonstick saucepan coated with cooking spray, cook turkey, green pepper and onion over medium heat until meat is no longer pink. Add garlic; cook 1 minute longer. Drain. Stir in beans, salsa, tomato sauce, tomatoes, onion powder, garlic powder and cumin. Bring to a boil. Reduce heat; simmer, uncovered, 10 minutes.
Preheat oven to 350°. Spread 1 cup meat sauce into a 13x9-in. baking dish coated with cooking spray. Top with six tortillas. Spread with half the remaining meat sauce; sprinkle with 1 cup cheese. Layer with remaining tortillas and meat sauce.
Cover and bake 20 minutes. Uncover; sprinkle with remaining cheese. Bake 5-10 minutes longer or until bubbly and cheese is melted.