Preheat your oven to 350ºF and line a baking sheet with parchment paper or aluminum foil and set it aside.
Brown your Italian sausage in a skillet until there is no more pink left. Use a wooden spoon or a spatula to break up the sausage as it is cooking so that it turns into small crumbles. Once the meat is browned, drain off any excess grease. Remove the sausage from the heat and set aside.
Cut your Hawaiian rolls in half lengthwise using a sharp knife, removing the top half from the bottom half. Pour ¾ cup of the marina sauce on the bottom half of the rolls and spread it out evenly using a spoon or a spatula.
Now add a thick layer of shredded mozzarella cheese all over the top of the marinara sauce. Next, sprinkle the cooked Italian sausage in one even layer, followed by the chopped canadian bacon, then the chopped pepperoni.
Make sure that you are spreading each ingredient evenly over the rolls so that you get a piece in every single bite!
Once all of the meats are added to the rolls, drizzle the remaining ¼ cup of marinara sauce that you reserved, over the top of the meat. Now lay the sliced mozzarella cheese right on top of the meat and sauce.
Now gently lay the top buns back on top of the Hawaiian rolls. Place the butter, Italian seasoning (or basil), and garlic powder in a microwave safe bowl and microwave it on high for 20-30 seconds until the butter is melted.
Spread the garlic butter mixture evenly over the top of the rolls. Cover the sliders with aluminum foil and place the sheet pan in the oven to bake for 15-20 minutes, or until the cheese is melted and the rolls are golden brown.
Remove from the oven and serve immediately. Enjoy!