Brown meat with peppers, carrots, onions and garlic in large nonstick skillet. Add tomatoes, salsa and cumin; mix well. Cover; simmer 5 min, Remove from heat. Stir in corn.
Spread 2 cups tomato mixture onto bottom of 13x9-inch baking dish; top with 4 tortilla halves, with cut-sides of tortillas facing sides of dish. Cover with layers of half the beans, 2-1/2 cups of the remaining tomato mixture and ½ cup cheese. Repeat layers. Top with remaining tortillas, tomato mixture and cheese; cover with sheet of foil sprayed with cooking spray.
Bake 35 to 40 min. or until heated through, uncovering for the last 5 min. Let stand 5 min. before cutting to serve.