When it comes to creating the perfect Italian sub, using the right grilling equipment can truly elevate the flavor and texture of your sandwich. The Blackstone E-series griddle offers an excellent cooking surface that heats evenly, allowing you to grill your meats, vegetables, and bread to perfection. I found that searing the Italian cold cuts like salami, ham, and pepperoni on the griddle enhances their taste and adds a delightful smokiness that complements the fresh toppings. Additionally, to take your Italian sub to the next level, consider grilling the peppers and onions until they're slightly caramelized. This adds a touch of sweetness and softens their texture, creating a nice contrast with the crunchy bread. Don't be afraid to experiment with different cheeses such as provolone or mozzarella; melting them on the griddle right before serving binds all the ingredients together beautifully. In my experience, preparing the sandwich on a Blackstone E-series griddle not only provides great flavor but also speeds up the cooking process, especially when making multiple sandwiches for friends or family gatherings. Overall, investing some time in grilling each component separately before assembling ensures a delicious, satisfying Italian sub that stands out from the ordinary deli sandwiches.