Preheat the oven to 450°F. Spray a large baking sheet with cooking spray or line with parchment paper or foil.
Combine all meatball ingredients in a large bowl and mix well with a wooden spoon. Form into meatballs, about the size of a golf ball, and place in the prepared dish. You should get about 42 meatballs. TIP: Spray your hands with cooking spray first, then form the balls. The meat will not stick to your hands.
Bake for 17 minutes or until meatballs are fully cooked (internal temperature of 165°F).
Prepare the sauce: In a large skillet or saucepan, combine soy sauce, brown sugar, water, pineapple juice, garlic, ginger, and orange zest. Whisk together over medium heat until sugar has dissolved.
Stir together cornstarch and cold water, then add to the teriyaki sauce. Simmer the sauce until thickened, about 5 minutes.
Prepare either white or brown rice.
While rice is cooking, add cooked meatballs into the teriyaki sauce, and gently stir, not to break up the meatballs until they are well coated. Allow to simmer for a few minutes, then serve over rice.