Preheat grill on high for 15 minutes. While grill is preheating, brush oil olive on ciabatta halves on all sides, set aside.
Place meatballs in a shallow microwaveable dish. Cover with spaghetti sauce and place plastic wrap over the top. Microwave on high until internal temperature reaches 165 degrees. (Times will vary based on microwave wattage.)
Turn grill down to medium heat and grill both sides of the ciabatta halves, just enough to toast. Arrange each ciabatta bottom half on a plate. Place 6 hot meatballs with sauce on ciabatta rolls. Then cover with one slice of provolone cheese. Sprinkle with half tablespoon of chopped basil. Cover with grilled ciabatta top half. Garnish each plate with a basil sprig
Alternative Method: Place frozen meatballs in a slow cooker and cover with spaghetti sauce. Cook on HIGH for 3-4 hours.