Follow these simple steps to create amazing Mini Meatball Sliders:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Mix Ingredients: In a large bowl, combine ground beef, breadcrumbs, Parmesan cheese, parsley, egg, garlic, Italian seasoning, salt, and pepper. Mix until well combined.
3. Form Meatballs: Shape the mixture into small meatballs, about 1 inch in diameter.
4. Bake Meatballs: Place the meatballs on a baking sheet lined with parchment paper. Bake for 20-25 minutes or until cooked through and browned.
5. Warm Marinara: While the meatballs are baking, warm the marinara sauce in a saucepan over medium heat.
6. Assemble Sliders: Once the meatballs are cooked, place them inside the slider buns. Spoon marinara sauce over each meatball.
7. Add Cheese: Sprinkle shredded mozzarella cheese on top of the meatballs and return to the oven for an additional 5 minutes or until the cheese is melted.
8. Serve: Remove from the oven and serve warm, garnished with additional parsley if desired.

These steps will guide you in creating these incredible sliders effortlessly, ensuring a delicious result every time.