Add all meatball ingredients to a large bowl, then mix with your hands or a spatula just until combined. Roll into approximately 48 balls using roughly 1-½ tablespoons of meat mixture for each. Place on a large cookie sheet line with non-stick foil.
Bake at 400 degrees for 18-20 minutes or until internal temperature reaches 155 degrees. Allow meatballs to rest 5 minutes before serving. Temperature will continue to rise as they rest.
Teriyaki Sauce
In a small saucepan, mix all the teriyaki sauce ingredients together and heat over a low heat, stirring constantly. Simmer for 3 minutes, remove from heat and drizzle over the meatballs.
Garnish with sliced green onions and/or sesame seeds, if desired.
Notes
You can make and store unbaked meatballs in the freezer in an airtight container for 3-4 months. You can store baked meatballs in the freezer in an airtight container for 2-3 months.You can store baked meatballs in the refrigerator for 3-4 days.