Preheat oven to 375. Line two baking sheets with parchment paper, and set aside.
Combine all ingredients in the bowl of a stand mixer. With a paddle attachment, mix on low until thoroughly combined. (Mixture can also be mixed by hand in a large mixing bowl.)
Form mixture into 1.5" balls (a miniature ice cream scoop works well for this). Place balls on prepared baking sheets about 1 inch apart. Bake for 20 minutes, or until browned and cooked through.
Notes
Freeze cooled meatballs in zip-lock bags for up to 3 months.