Preheat oven to Gas 6, 200ºC, 400ºF. Cut each potato into 8 wedges. Place in a roasting tin with the onion. Drizzle with oil, sprinkle with chilli powder and black pepper, and roast for 15 minutes. Core the apples and cut into rings. Place 4 pork chops in a separate tin with apple slices on top. Brush with oil and roast for 25 mins or cooked through. Serve with mixed vegetables. For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home.