Preheat the oven to 400°F. Line a baking pan with parchment paper or a silicone mat.
In a medium bowl, combine the ground beef, breadcrumbs, egg, parsley, garlic, salt, and pepper.
Scoop the meat mixture into 24 (1 ½-tablespoon) amounts and roll into balls with your hands. Place on the prepared baking pan. Bake for 12 to 15 minutes, or until the meatballs are browned and fully cooked.
Notes
To freeze the meatballs, when raw or baked, place on a baking sheet and leave in the freezer for about 1 hour. Then transfer the meatballs to a sealed freezer-safe container or bag to freeze for up to 3 months. They can be baked right from the freezer (add about 5 to 10 minutes to baking time). Fully cooked meatballs can be reheated directly in sauce.