While the chicken is grilling, glaze ingredients to a boil over medium-high heat and cook until mixture is reduced and thickened, about 8-10 minutes. Be patient because it takes a little while. But once it starts getting really thick, immediately take it off the heat! Glaze both sides of chicken the last few minutes of grilling and serve chicken over rice.
Sidenote: I used the extra coconut milk left in the can as part of the liquid in my rice and it was unbelievable! It was very mildly sweet and paired so well with the chicken. Yum!