Preheat the grill to 400°F.
In a bowl, whisk together 2 tablespoons soy sauce, 2 teaspoons honey, 1 tablespoon lime juice, 1 clove garlic (minced), 1 tablespoon ginger (chopped), 1 tablespoon sesame oil, and half of the 1/2 tablespoon white & black sesame seeds; reserve the other half of the sesame seeds for garnish.
Place the 2 skin-on chicken breasts in a resealable plastic bag or a shallow dish, pour the marinade over the chicken to coat, seal or cover, and refrigerate for at least 30 minutes.
Remove the chicken from the refrigerator and discard the used marinade. (Pat the chicken dry with paper towels if you prefer to reduce flare-ups.)
Place the chicken on the preheated grill and cook 6 minutes on the first side, then flip and cook 6 minutes on the second side, or until an instant-read thermometer inserted into the thickest part reads 165°F.
Transfer the chicken to plates and garnish with the handful of fresh coriander and the reserved sesame seeds.