Heat oven to 400°F.

Prepare dinner as directed on package. While Macaroni is cooking, cook meat with taco seasoning as directed on package.

Stir sour cream into prepared Dinner; spoon 1/2 into 8-inch square baking dish. Top with layers of meat mixture, 1 cup cheese and remaining Dinner mixture; cover with foil.

Bake 15 min.; top with salsa and remaining cheese, Bake, uncovered, 5 min. or until cheese is melted.

SPECIAL EXTRA: For extra crunch prepare and bake as directed , topping with 1/2 cup coarsely crushed tortilla chips along with the salsa and cheese.