In a large non-stick saucepan coated with cooking spray, cook green pepper and onion over medium heat until softened. Add garlic; cook 1 minute longer.
Stir in turkey, beans, salsa, tomato sauce, tomatoes, onion powder, garlic powder and cumin. Bring to a boil. Reduce heat; simmer, uncovered for10 minutes.
Preheat oven to 350°F. 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.