Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray. In large bowl, mash beans slightly. Stir in tomatoes, onions, bell pepper, salsa, chili powder and cumin; mix well.
In small bowl, mix ricotta cheese, garlic powder and egg.
Spread 1 cup of the tomato mixture over bottom of baking dish. Top with half of noodles, overlapping slightly. Top with half of remaining tomato mixture. Spoon ricotta mixture over top; spread carefully. Top with half of cheese, then with remaining noodles, tomato mixture and cheese. Spray sheet of foil with cooking spray; cover baking dish with foil, sprayed side down.
Bake 40 to 45 minutes or until noodles are tender. Uncover; let stand 15 minutes before serving.