Pre-heat oven to 450 degrees and lightly spray an 8×8″ baking dish with cooking oil.
In a medium bowl, combine salsa, cumin, salt, diced tomatoes, and tomato sauce
Spread ⅔ cup of the sauce sauce in bottom of the prepared baking dish. Place two of the noodles over the sauce and top with ½ cup of corn and ½ cup of beans. Sprinkle with a ½ cup of cheese.
Repeat layers and cover with remaining noodles. Sprinkle with remaining cheese.
Cover the dish with foil and bake at 450 degrees for 30 minutes or until the top is turning golden brown and the sauce is bubbly.
Remove from oven, let stand for 15 minutes, and sprinkle with scallions. Slice and serve!