Remove rolls from package in one piece. Cut the rolls down the center, forming 2 groups of 6 each. Turn each roll section on it’s side and make a cut halfway down the center, separating the tops from the bottoms, but keeping the rolls together.
Place roll bottoms side by side on a large piece of foil. Brush one half of bottoms with pesto and sprinkle with additional pine nuts if desired.
Spread honey mustard on the other roll bottom section.
Layer meats and cheeses on top of bottoms and replace top sections on bottom sections.
Pour melted butter slowly over the tops of rolls.
Sprinkle the pesto rolls with Italian seasoning and Pecorino Romano.
Wrap rolls completely in foil and place them on a baking sheet or in a shallow casserole. Bake for 20 minutes at 350 then uncover and bake for 5 minutes more.