Preheat oven to 350 F. In a small bowl, combine softened butter with minced garlic and Italian seasoning. Open sub buns and spread butter mixture in the insides of each bun.
Top each sandwich with 2 slices of ham, 4 slices pepperoni and one slice of provolone cheese. Close sandwich and place onto a baking sheet. Bake for 8-10 minutes, until the cheese has melted.