In a large bowl, combine ground chicken, grated ginger, minced garlic, soy sauce, sesame oil, red pepper flakes, chopped cilantro, egg, and panko breadcrumbs. Mix gently until just combined. Be careful not to overmix.
Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
Roll the chicken mixture into meatballs, about 1-1.5 inches in diameter. Place them on the prepared baking sheet.
Bake for 18-20 minutes, or until the meatballs are cooked through and lightly browned.
While the meatballs are baking, prepare the sauce. In a small bowl, whisk together hoisin sauce, soy sauce, rice vinegar, sesame oil, and Sriracha.
Once the meatballs are cooked, toss them in the prepared sauce. Serve immediately.
Notes
Garnish with extra cilantro and sesame seeds if desired. These meatballs are delicious served with steamed rice or as an appetizer.