Step 1 - Marinate the chicken Mix all the marinate ingredients in a bowl. Add the mix to the chicken, rubbing it in with your fingers to ensure the chicken is completely covered with the dry rub. Cover with clignfilm and set aside for up to 30 minutes in refrigerator before cooking.
Step 2 - Prepare the Cocoyams Peel the Cocoyams and remove any black spots or discolouration on the flesh. Rinse Cocoyams (they will feel slimy when rinsed), and then chop into chunky cubes. Place the cubed Cocoyams in a pot and add enough water to cover the Cocoyams. Add salt to taste. Bring to boil over medium to high heat, and then reduce heat to medium and let cook until soft. For chunky cubes such as in the picture above, the Cocoyams should be soft in 15 - 20 minutes. Take off the heat, drain and set aside.
Step 3 - Prepare the Teriyaki Sauce While Cocoyams are boiling, combine all the ingredients for the Teriyaki sauce in a pan and heat on medium to high setting. When the mixture reaches a simmer, bring the heat down to low and allow to reduce for 10 minutes. Take off heat and allow to cool. The sauce will continue to thicken as it cools.
Step 4 - Bring it all together Add 1 tablespoon extra virgin olive oil to a pan and heat. When hot, add the marinated chicken and fry for about 2 -3 minutes per side. Repeat on other side until chicken is browned all over. Add the boiled Cocoyams to the pan and fry for 2 - 4 minutes. Try to avoid stirring or turning the cocoyams too frequently while frying as they do tend to get mushy and may crumble into a mash. Add the sauce to the pan, and the chopped spring onions.