Cheesy Volcano Meatballs

What You Need
1 lb. lean ground beef
6 RITZ Crackers, finely crushed
1/4 cup KRAFT Grated Parmesan Cheese
3/4 cup spaghetti sauce, divided
12 KRAFT Cheddar Cheese Cubes
4 hot dog buns, partially split
Make It

PREHEAT oven to 400ºF. Mix meat, cracker crumbs, Parmesan cheese and 1/4 cup of the spaghetti sauce in medium bowl. Shape into twelve meatballs, using about 2 Tbsp. meat mixture for each.

PLACE, 2 inches apart, in shallow baking pan sprayed with cooking spray. Press 1 cheese cube deeply into center of each meatball.

BAKE 14 min. or until meatballs are cooked through (160ºF). Meanwhile, microwave remaining 1/2 cup spaghetti sauce in small microwaveable bowl on HIGH 30 sec. or until heated through (adult assisted).

SPOON sauce evenly into buns. Fill each with three meatballs.