Follow these simple steps to create your Hot Italian Sub Sliders:

1. Preheat your oven to 350°F (175°C).
2. Prepare the Baking Dish: Grease a 9×13 inch baking dish or line it with parchment paper for easy removal.
3. Slice the Buns: Cut the slider buns in half horizontally, leaving them connected at the back.
4. Layer the Ingredients: Place the bottom halves of the buns in the baking dish. Layer on the salami, pepperoni, and ham evenly over the buns.
5. Add Cheese: Place the provolone cheese slices over the meats, ensuring they cover the entire surface.
6. Spread Marinara Sauce: Drizzle marinara sauce evenly over the cheese layer.
7. Add Seasonings: In a small bowl, mix together olive oil, Italian seasoning, garlic powder, onion powder, salt, and pepper. Brush this mixture over the top of the buns.
8. Cover and Bake: Place the top halves of the buns over the sliders. Cover the baking dish with aluminum foil and bake for 20 minutes.
9. Uncover and Finish Baking: Remove the foil and bake for an additional 5-10 minutes, or until the tops are golden and crispy.
10. Garnish and Serve: Once done, remove from the oven. Optionally, garnish with fresh basil leaves before serving.

These steps ensure a successful batch of Hot Italian Sub Sliders that are sure to impress.