Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper or lightly spray with cooking oil.
In a large mixing bowl, combine ground turkey, panko breadcrumbs, eggs, chopped green onions, garlic powder, salt, and black pepper. Mix gently with your hands until just combined. Do not overwork the mixture.
Using a small cookie scoop, portion the meat mixture and roll into smooth balls about 1.5 inches across. Place on prepared baking sheet with space between each meatball. You should get about 40 meatballs.
Bake for 20-25 minutes until golden brown and internal temperature reaches 165°F (74°C).
While meatballs bake, prepare the sauce. In a small saucepan over medium heat, combine sriracha, soy sauce, rice vinegar, honey, minced garlic, grated ginger, and sesame oil.
Whisk continuously and bring to a gentle boil. Reduce heat to low and simmer for 8-10 minutes, stirring occasionally, until sauce thickens and becomes glossy.
Remove sauce from heat. When meatballs are done, transfer to a large serving bowl.
Pour the honey sriracha sauce over the hot meatballs and gently toss until each meatball is coated with the glaze.
Garnish with sliced green onions and sesame seeds. Serve immediately over rice, with noodles, in lettuce wraps, or as party appetizers with toothpicks.