Cheese stuffed meatballs fill a garlic buttered hoagie and are layered with melted cheese in these Cheese Stuffed Meatball Subs.
While the meatballs are cooking, combine the butter, garlic salt, and parsley in a small bowl. Brush the butter mixture all over each hoagie bun.
Remove the meatballs from the oven and set aside.
Place 2 slices of provolone cheese on each buttered hoagie bun. Add 3-4 meatballs on top of the cheese. Top with marinara sauce and 2 more slices of provolone cheese.
Bake for 5-10 minutes, or until the cheese melts.
Broil for 2-3 minutes, or until the cheese is hot and bubbly and the crust browns.