Preheat the grill to 400°F (205°C).
In a bowl, whisk together 2 tablespoons soy sauce, 2 teaspoons honey, 1 tablespoon lime juice, 1 clove minced garlic, 1 tablespoon chopped ginger, 1 tablespoon sesame oil, and half of the 1/2 tablespoon white & black sesame seeds until well combined.
Place the 2 skin-on chicken breasts in a shallow dish or a resealable plastic bag, pour the marinade over them, turn to coat both sides, then cover or seal and refrigerate for at least 30 minutes.
Remove the chicken from the marinade and discard the used marinade. Pat the chicken lightly dry with paper towels.
Place the chicken on the preheated grill, skin-side down, and cook for 6 minutes. Flip the breasts and cook for another 6 minutes, or until cooked through.
Transfer the chicken to plates, sprinkle with the remaining sesame seeds, and garnish with a handful of fresh coriander before serving.