Add the oil to the skillet heating it to medium.
Add one meatball at a time to the heated skillet.
Cook for about 5 minutes or until they are seared on all sides.
Place the meatballs on a parchment-covered baking pan into the oven.
Cook for 12 minutes.
Remove from the oven and set to the side.
Cut an oval on the top of the roll leaving about an ½ inch on the ends and sides.
Scoop but do not cut through to the bottom half of the roll.
Use a knife to hollow out the top of the roll.
Place the roll on the baking pan.
Lay 1 slice of cheese in the hollowed-out area.
Return to the oven and cook for 8 minutes.
Add 2 tbsp. of marinara on top of the cheese.
Place 3 meatballs on top of the cheese.
Add more marinara on top of the meatballs.
Place grated parmesan cheese on top of the marinara.
Return to the oven and bake for 6-8 minutes.
Enjoy!
