Saute the onions, ginger and cranberries in a pot with 2 Tbsp of the oil till soft.
Add the sugar, cranberry juice, orange juice, zest and soy. Simmer till reduced by half. Transfer to a blender and slowly mix with the remaining oil. Season with salt and pepper.
Make a few slashes on the skin side of the chicken. Brush each thigh with the teriyaki glaze and cook in a 325 degrees Fahrenheit oven for 15 minutes.
Bring out and re-glaze. Return to oven at 350 degrees Fahrenheit for a further 10-15 minutes till cooked. Rest the thigh for a few minutes.
Meanwhile heat a wok and swirl in 1 tablespoon of oil. Add the minced garlic and cook for 20 seconds. Add the bok choy and 1 tablespoon of water. Stir fry for 1 minute. Add the other seasonings. Cook for a further 30 seconds. Transfer to a dish. Chop the chicken thigh, Chinese style and arrange on top of the garlic bok choy, pouring over any juices from the rested meat.
