Pat the 8 chicken drumsticks dry with a kitchen towel and place them in a 10.6 × 7-inch baking dish. Season evenly with kosher salt and ground black pepper.
Preheat the oven to 375°F (190°C).
In a medium bowl, whisk together 1 tablespoon sesame oil, 1/4 cup honey, 1/3 cup low-sodium soy sauce, sliced onion, 2 tablespoons chopped garlic, 2 tablespoons minced fresh ginger (if using), and 1 teaspoon smoked paprika (optional) until combined.
Pour the marinade over the drumsticks and massage it into the chicken for about 5 minutes so the flavors penetrate.
Cover the baking dish with aluminum foil and let the chicken marinate at room temperature for 30 minutes (or refrigerate up to 8 hours for more flavor).
Remove the foil and place the baking dish in the center of the preheated oven. Bake uncovered for 40 minutes, until the drumsticks are browned and cooked through (internal temperature 165°F / 74°C).
Remove from the oven, spoon any pan juices over the drumsticks, and garnish with sliced green onions before serving.