1 Preheat the oven to 190ºC/ Fan 170ºC/Gas Mark 5.
2 Wash the potatoes and quarter.
3 Peel the carrot and parsnip and cut into batons.
4 Place all the vegetables together with the oil in a small roasting dish.
5 Lay the chicken breast on top of the veg, then roast for 25 minutes or until the chicken is cooked through and the vegetables are tender.
6 Remove the tray from the oven, transfer the chicken to a plate to cool.
7 Mix the peas with the other vegetables and return to the oven for 5 minutes to heat through.
8 Heat the gravy in a small pan until hot.
9 Remove the skin from the chicken, then slice into strips, add the vegetables and pour over the gravy.
10 Cool slightly until cool enough to handle.