Combine the honey, soy sauce, mirin, garlic clove and Chinese five spice powder in a large zip top bag.

If the chicken breasts are large, cut them in half lengthwise, forming 2 thinner breast pieces. Add the chicken to the bag with the marinade. Marinate for at least 2 hours, up to overnight.

Preheat a grill (or use a grill pan) over medium-high heat. Oil lightly. Remove the chicken from the marinade and discard the marinade. Cook the chicken until cooked through, about 5-7 minutes per side.

Serve topped with sliced green onions and sesame seeds.