Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine the Italian bread crumbs with milk and let it sit for about 5 minutes.

Add the ground beef, finely chopped onion, minced garlic, egg, salt, black pepper, grated Parmesan cheese, and fresh parsley to the bowl. Stir gently until just combined.

Wet your hands and roll the meat mixture into 2-inch meatballs, placing them on the prepared baking sheet.

Bake the meatballs for 18-20 minutes until golden brown and cooked through.

Carefully drain any excess fat and let the meatballs cool slightly before serving with your favorite sauce.