Oven-roasted potatoes have a lovely crispiness without being high in calories. They taste best when just out of the oven. If it sits too long after baking it loses its crispiness. If pressed for time, roast the potatoes in the oven until half-done and then re-roast before serving till you get the desired texture. Adjust the amount of lemon in the dressing depending on how tart you like your sauce.
