Creating homemade meatballs is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Mix Ingredients: In a large mixing bowl, combine the ground beef, breadcrumbs, Parmesan cheese, fresh parsley, beaten egg, garlic, onion powder, Italian herbs, salt, pepper, and milk.
3. Combine: Mix all ingredients until well combined. Be careful not to overmix, as this can make the meatballs tough.
4. Shape Meatballs: Using your hands, scoop out portions of the mixture and roll them into golf ball-sized meatballs. Aim for about 1.5 inches in diameter.
5. Bake: Place the meatballs on the prepared baking sheet, spaced about 2 inches apart. Bake in the preheated oven for 25-30 minutes, or until browned and cooked through.
6. Check Doneness: To ensure they are fully cooked, use a meat thermometer. Internal temperature should register at least 160°F (70°C) for beef meatballs.
7. Optional Sauce: For added flavor, you can simmer cooked meatballs in your favorite marinara sauce for 10-15 minutes prior to serving.

These steps will guide you to create moist and flavorful homemade meatballs that are sure to impress.