For extra flavor, consider adding a pinch of red pepper flakes to the ground beef mixture. Feel free to experiment with different types of cheese in the sauce, such as provolone or Gruyere. If you don't have fresh basil or parsley, dried herbs can be substituted, but use half the amount. Optional toppings: half-moon zucchini slices, sauteed mushrooms, sliced pepperoncini, chopped Calabrian chiles, etc.