Place onions, garlic, red bell pepper and cilantro in food processor bowl with S Blade. Pulse chop until fine.
Mix ground turkey, chopped vegetables, egg, Panko crumbs and salt in medium bowl. Cover and refrigerate 15 minutes.
Combine soy sauce, water and cornstarch in the measuring jar; stir until cornstarch is dissolved.
Shape turkey mixture into 24 (1-inch) meatballs; place into an 8"x8” baking dish and pour soy sauce mixture over meatballs.
Bake in a 375°F oven 30-40 minutes, or until sauce is thickened and meatballs are cooked through, turning meatballs once during cooking.
Combine sauce ingredients in medium saucepan. Cook and stir on medium heat 10 min or until sauce is heated through. Serve in small a bowl with meatballs.