Step 1

Preheat oven to 350 degrees. Lightly coat a 9-x 13-inch baking dish with cooking spray. Cook noodles according to package directions; drain well.

Step 2

Meanwhile in a large skillet over medium heat, cook beef, red bell pepper, and mushrooms until beef is no longer pink; drain liquid. Stir in tomato sauce, garlic, pepper, and noodles.

Step 3

In a medium bowl, combine cream cheese and sour cream; mix until smooth. Stir in half the scallions.

Step 4

Spoon half the noodle mixture into baking dish. Top with cheese mixture and remaining noodle mixture.

Step 5

Cover and bake 25 to 30 minute or until heated through. Uncover and sprinkle with cheddar cheese. Bake 3 to 5 minutes or until cheese is melted. Sprinkle with remaining scallions and serve.