Preheat oven to 180C/350FWash potatoes well, removing the eyes and any bruisesMake both sides flat by trimming the potato and slice the potato in half lengthwisePlace potatoes on a baking sheet covered with baking paper (not necessary but they won't stick with the paper) and rub a little olive oil over the cut side.Sprinkle each potato with seasoning salt and paprika and place in the oven for about 30 minutes.Garnish with a dollop of sour cream and a sprinkling of chives.