1. Preheat your oven to 350°F (175°C).
2. Carefully slice the Hawaiian buns in half horizontally, keeping the top and bottom halves intact.
3. Lay the bottom half of the buns in a 9×13-inch baking dish.
4. Spread the mayonnaise evenly over the bottom half of the buns.
5. Layer the salami, mortadella, ham, and provolone cheese over the buns in the baking dish.
6. Sprinkle the shredded lettuce, chopped roasted red peppers and sliced olives evenly over the layered meats and cheese.
7. Drizzle the Italian dressing over the top, ensuring even coverage.
8. Place the top half of the buns back on, sandwiching the meats, cheese, and toppings.
9. Lightly brush the tops of the buns with a little more Italian dressing and sprinkle with dried oregano.
10. Cover the dish with aluminum foil and place it in the preheated oven.
11. Bake for 15-20 minutes, or until the cheese is melted and the sliders are heated through.
12. Remove from the oven, let cool slightly, and then cut into individual sliders. Serve warm.
Variations & Tips
For a spicier kick, add a few slices of pepperoncini or a sprinkle of red pepper flakes. You can also swap out the meats with your favorite Italian cold cuts, like capicola or prosciutto. For a vegetarian version, try using grilled vegetables like zucchini, eggplant, and bell peppers instead of the meats. Remember, the key to these sliders is to use fresh, high-quality ingredients to really bring out those delicious Italian flavors.