Hollow out the inside of each roll, making the holes big enough for the meatballs but not piercing through the bottom.
In a sauce pan over medium low heat, melt the butter, garlic, parsley, and oregano, until the butter just starts to brown.
Brush the butter sauce all over the insides and tops of the rolls.
Add about 1 tablespoon of sauce to each hole. Put a meatball in the hole. Then top with the remaining sauce and the shredded mozzarella.
Bake for 12-15 minutes, until the cheese is melted and bubbly. Remove from oven.
Using a sharp knife, slice between each roll. Separate them slightly on the baking dish and put them back in the oven for 5 more minutes to crisp them up.