Directions

1. Heat greased grill to medium-high heat.
2. Mix meat, spinach, bacon, garlic powder and 2 Tbsp. tomatoes just until blended; shape into 12 (2-inch) meatballs.
3. Press 1 VELVEETA cube into center of each meatball, completely enclosing VELVEETA. Flatten to 2-1/2-inch diameter. Grill 5 min. on each side or until done (160ºF).
4. Meanwhile, microwave remaining VELVEETA and remaining tomatoes in microwaveable bowl on HIGH 3 min. or until VELVEETA is completely melted and mixture is well blended when stirred.
5. Fill buns with burgers. Serve with VELVEETA sauce.