Prepare the hoagie roll by slicing it lengthwise.
In a bowl, combine salad greens, tomatoes, cucumbers, red onion, and roasted red peppers.
In a separate bowl, whisk together the red wine vinegar, olive oil, salt, and pepper.
Drizzle the dressing over the salad mixture and toss well to combine.
Layer salami and provolone cheese on the bottom half of the hoagie roll.
Spoon the dressed salad mixture on top of the salami and cheese.
Cap the sandwich with the top half of the hoagie roll.
Cut the sandwich in half and serve immediately.