Pre heat the oven to 180C/350F/Gas Mark 4.
Add the prepared sweet potato and chicken to a bowl with all of the ingredients except the spring onion and cheese, season very well and rub until coated all over. Place into a deep roasting dish and bake for 30 minutes, turning and mixing half way.
Dice the spring onion and throw onto the traybake and top with the cheddar.
Return to the oven for 6-8 minutes until the cheese has melted.
P: 49 C: 66 F: 15