Heat your grill on high heat for at least 10 minutes, then reduce to medium-high.
In a small microwavable bowl, whisk together the soy sauce, vinegar, sriracha, sesame, and honey. The honey doesn’t mix in very well unless it’s warm, so pop the marinade in the microwave for 10-15 seconds and mix again. Take about 2 tablespoons of the mixture and add it to a medium bowl along with the chicken and toss to coat.
Add the cornstarch or tapioca to the remaining marinade and whisk it in. Microwave for about 1 minute, stirring halfway through. The marinade should now be a nice thick glaze that coats a spoon.
Grill the chicken for about 5 minutes on one side, or until you get nice grill marks. Flip the chicken and then brush the reserved glaze generously on top. Cover the grill and grill for 2-3 more minutes, or until nice and charred/browned on the bottom (do not flip again!).
Serve the chicken with any extra glaze on the side.