Preheat grill to 350°F
Cut out the center of each slider and press down, then pull up to remove
Brush the inside with garlic butter and place on grill for about 5-10 minutes
Place some spaghetti followed by parmesan cheese, meatball and some sauce into each bread hole
Top meatballs with more sauce and mozzarella
Grill for 10-15 minutes or until cheese is melted
Garnish with parmesan cheese, red pepper flakes, and parsley
