Preheat oven to 400 degrees F. Line a rimmed baking sheet with parchment paper or spray with non-stick cooking spray. Set aside.
To make meatballs, mix together all meatball ingredients in a large bowl until combined. Form mixture into approximately 24 meatballs, about 1.5 inches in size. Place on prepared pan.
Bake for 18 to 20 minutes, until the meatballs are cooked through and nicely browned on the outside.
While meatballs are cooking, prepare sauce. In a deep, non-stick skillet, whisk together all sauce ingredients. Heat over medium-high heat, stirring constantly, until sauce boils. Reduce heat to medium and cook uncovered for about 3 minutes, stirring often. Sauce will thicken a bit.
Add cooked meatballs to the sauce and toss to coat or serve it as a dipping sauce with the meatballs.
Serve warm over zucchini noodles, rice noodles or rice topped with extra sauce. Garnish with additional minced green onion and a sprinkle of sesame seeds, if desired.