In a large nonstick skillet, cook beef over medium heat until no longer pink; drain.
Stir in the beans, corn, jalapeno, taco seasoning and 3/4 cup tomato sauce.
Combine salsa and remaining tomato sauce.
Spread 1/4 cup into 13x9 inch baking dish coated with nonstick cooking spray. Layer with four noodles, half of the meat sauce, 1 cup salsa mixture, 1/2 cup Mexican cheese blend and 1/2 cup cheddar cheese. Repeat layers. Top with the remaining noodles, salsa mixture and cheeses.
Cover and bake at 350F for 45-50 minutes or until edges are bubbly and cheese is melted. Let stand 10 minutes before cutting. Serve with sour cream, avocado and onions.