Step 1: Prepare the Grinder Sauce (Optional)

1. Mix the Ingredients: In a small bowl, combine the mayonnaise, Dijon mustard, Italian dressing or balsamic vinegar, garlic powder, and red pepper flakes (if using). Stir until smooth and well-blended.
2. Season to Taste: Add a pinch of salt and pepper, then set aside. This sauce adds a creamy and tangy layer to your sandwich, but feel free to skip it if you prefer a more classic sandwich.

Step 2: Prepare the Sandwich Fillings

1. Slice the Vegetables: Slice the tomato, onion, and any other vegetables you’d like to include (such as lettuce or peppers). This adds freshness and crunch to the sandwich.
2. Slice the Meats: If your deli meats are in large slices, consider cutting them into smaller pieces to make it easier to layer them inside the roll.

Step 3: Assemble the Sandwich

1. Slice the Hoagie Rolls: Slice the hoagie rolls lengthwise, but be careful not to cut all the way through—leave one side intact so the sandwich holds together.
2. Spread the Sauce: If you’re using the grinder sauce, spread a generous amount on the inside of both rolls.
3. Layer the Meats and Cheese: On the bottom half of the hoagie rolls, layer the deli meats in a thick pile. Add the provolone cheese slices on top.
4. Add Vegetables: Layer the shredded lettuce, tomato slices, red onion, and pickled peppers (if using). The freshness of these veggies will balance out the richness of the meats and cheese.
5. Drizzle the Oil and Vinegar: Drizzle a small amount of olive oil and red wine vinegar on top of the veggies for extra flavor and moisture. Sprinkle dried oregano, salt, and pepper to taste.
6. Top the Sandwich: Close the sandwich by placing the top half of the hoagie roll over the fillings.

Step 4: Toast the Sandwich (Optional)

1. Preheat Your Oven or Grill: If you prefer a hot grinder sandwich, preheat your oven to 375°F (190°C) or heat a grill pan over medium heat.
2. Toast the Sandwich: Place the sandwich in the oven for 5-7 minutes, or until the cheese is melted and the bread is toasted to your liking. Alternatively, grill the sandwich for a few minutes on each side, pressing it slightly to get a crisp crust.
3. Remove and Serve: Once the sandwich is toasted and the cheese is gooey, remove from the oven or grill. Let it cool for a minute before slicing into it for easy handling.

Step 5: Serve and Enjoy

Cut the sandwich into halves or quarters for easy serving. Serve with chips, a side salad, or even a pickle on the side for a complete meal.