In a medium bowl, whisk together mayonnaise, red wine vinegar, olive oil, dried oregano, garlic powder, salt, and black pepper until smooth.

In a large bowl, toss together the shredded lettuce, sliced red onion, and banana pepper rings. Drizzle the dressing over and mix gently.

Preheat oven or air fryer to 350°F (175°C). Slice hoagie rolls and place provolone cheese on the bottom halves. Toast for about 2 minutes.

After toasting, layer salami, pepperoni, and ham (or mortadella) over the melted provolone.

Spoon the slaw over the meats and layer any additional vegetables as desired. Drizzle with extra dressing if needed.

Place the top halves of rolls onto the sandwich, press down, and cut in half if desired.