1Heat oven to 350ºF. Grease 4-quart casserole.
2Cook beef in 10-inch nonstick skillet over medium heat 5 minutes, stirring occasionally, until brown; drain.
3Cook and drain pasta in 4-quart Dutch oven as directed on package. Return pasta to Dutch oven. Stir in beef, corn, salsa and beans. Spoon half of the pasta mixture into casserole. Sprinkle with 2/3 cup of the cheese. Spoon remaining pasta mixture into casserole. Place tomato slices on top. Sprinkle with remaining cheese.
4Cover and bake 35 to 40 minutes or until hot and cheese is melted.