Preheat the oven to 200F/ gas mark 6. Line a baking sheet with foil and lightly spray with baking spray. Mix together the salt, pepper, garlic and onion powders, and paprika.
Place the two pieces of chicken in the middle of the pan. Drizzle with ½ TBS of the oil, and ⅓ of the spice mixture.
Place into the preheated oven and roast for 10 minutes.
While the chicken is roasting, cut the potatoes and vegetables into small chunks. Put ito a bowl and toss together with the remaining oil and spice mixture.
Remove the chicken from the oven and spread scatter the vegetables around the chicken on the baking sheet. Scatter the parmesan cheese over all.
Return to the oven and roast for a further 20 to 25 minutes until the potatoes and vegetables are tender and the chicken juices run clear.
