Creating these Mini Meatball Sliders is a breeze if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C).
2. Mix Ingredients: In a large bowl, combine ground beef, breadcrumbs, Parmesan cheese, parsley, egg, minced garlic, onion powder, Italian seasoning, salt, and pepper. Mix until well combined.
3. Form Meatballs: Shape the mixture into small meatballs, about 1 inch in diameter. You should have around 24 meatballs.
4. Bake Meatballs: Place the meatballs on a baking sheet lined with parchment paper. Bake in the preheated oven for 15-20 minutes or until cooked through.
5. Prepare Buns: While the meatballs are baking, slice the slider buns in half. Place the bottom halves on a serving platter.
6. Add Sauce: Once the meatballs are done, remove them from the oven and toss them in marinara sauce.
7. Assemble Sliders: Place 2-3 meatballs on each bun bottom. Top with shredded mozzarella cheese.
8. Melt Cheese: Return the assembled sliders to the oven for an additional 3-5 minutes, or until the cheese is melted and bubbly.
9. Top with Buns: Remove from the oven and place the top halves of the buns on each slider.
10. Serve Warm: Serve immediately while they are warm and gooey.

These steps will guide you in creating delicious Mini Meatball Sliders that everyone will enjoy!