Preheat your oven to 425°F / 220°C and line a baking sheet with parchment paper for easy cleanup.
In a large mixing bowl, combine the ground beef, finely chopped onion, egg, salt, black pepper, and 2 minced garlic cloves.
Gently mix the with your hands until just combined. Be careful not to overwork the meat.
Shape the mixture into small balls, approximately 1. 5 inches in diameter, and arrange them in a single layer on the prepared baking sheet.
Bake for 12-15 minutes, or until the meatballs are browned and cooked through.
While the meatballs are baking, prepare the dipping sauce.
In a small bowl, whisk together the soy sauce, rice wine vinegar, grated ginger, green onion, 1 minced garlic clove, and stevia extract.
To serve, place 2-3 meatballs on a cocktail stick and arrange them around the bowl of dipping sauce. For a full meal, serve with a side of rice or quinoa and a fresh kale salad.
Don't overmix the meat mixture. A light hand is the secret to keeping your meatballs tender and juicy, not tough and dense.