Preheat the oven to 200ºC. Cut the potatoes, onions & lemons into wedges. Chop the capsicum into large chunks and place in a roasting pan along with the potatoes, onions & lemons. Chop the rosemary into small pieces (discard the wooden stalk) and add to the pan. Sprinkle over the lemon pepper & paprika. Lightly coat the vegetables with olive oil. Roast for 30 minutes or until the potatoes are cooked through and well browned. Garnish with extra lemon wedges & rosemary sprigs.