Prep Your Ingredients: Slice the baguettes or hoagie rolls horizontally and lightly toast them. Gather your meats, cheeses, and veggies.
Make the Dressing: In a small bowl, whisk together olive oil, red wine vinegar, Italian seasoning, salt, pepper, and a dash of garlic powder to create a flavorful dressing.
Assemble the Subs: Spread mayonnaise and Dijon mustard on the bottom half of each roll. Layer on the meats, cheeses, tomatoes, onions, lettuce, and banana peppers.
Drizzle with Dressing: Drizzle the dressing over the fillings, allowing it to soak into the bread and infuse the flavors.
Top and Serve: Sprinkle some oregano on top for a final touch of Italian flair. Close the subs, slice them in half if desired, and serve immediately.