Preheat Oven To 350 Degrees F.
Remove Hawaiian Rolls from package and turn all 12 on their side and cut in half lengthwise.
In a large saucepan, add 1/2 cup water then add meatballs over medium low heat, stirring until no longer frozen. Remove meatballs, drain any liquid.
Line a baking sheet with parchment paper. Place bottom half of rolls onto the center of the baking sheet.
Lay six slices of Provolone cheese over bottom half of rolls.
Place meatballs evenly over cheese.
Pour pasta sauce over meatballs.
Add Parmesan cheese to the top of meatballs and pasta sauce.
Place 6 more slices of Provolone cheese over meatballs.
Place top half of rolls on top of the cheese layer.
Melt garlic spread or butter in a small heat proof bowl and microwave for 12-15 seconds until melted. Use a pastry brush and brush generously over tops of rolls.
Bake at 350 degrees F. for 15-20 minutes, or until cheese is melted and hot.
Remove sliders from oven. Use a long knife to cut into squares. Arrange onto a serving plate with a warm bowl of pasta sauce for dipping.