01 -
Preheat the oven to 350°F. Line a baking sheet with aluminum foil and spray it with nonstick cooking spray.
02 -
Slice the rolls in half horizontally and place them cut-side up on the baking sheet. Remove the top halves and layer shredded mozzarella on the bottom halves.
03 -
Spoon the cooked spaghetti evenly over the mozzarella on the bottom halves of the rolls.
04 -
Sprinkle additional shredded mozzarella cheese over the spaghetti layer.
05 -
Replace the top halves of the rolls onto each bottom half. Brush the tops with melted butter and evenly sprinkle grated Parmesan, garlic salt, and Italian seasoning.
06 -
Bake uncovered for 20 to 30 minutes, until the cheese melts and the sliders are heated through. Adjust baking time based on slider size and filling quantity.