One-Pot Salsa Beef Skillet

1 lb. extra lean ground beef
2 cups water
1 cup Salsa
1 pkg. (14 oz.) KRAFT Deluxe Macaroni & Cheese Dinner Made With 2% Milk Cheese
2 cups frozen corn
1/2 cup Shredded Mexican Style Cheese
1 green onion, chopped
BROWN meat in large skillet on medium-high heat; drain.
ADD water, salsa and Macaroni; stir. Bring to boil. Reduce heat to low; cover. Simmer 10 min. or until macaroni is tender, stirring occasionally. Add corn and Cheese Sauce; stir. Cook 2 min. or until heated through.
TOP with cheese and onions.