Dip a dried rice paper sheet in a bowl of hot water. Leave for 30 secs, then remove and place on a clean tea towel and pat dry. Place the mint leaf in the upper part of the sheet, and some of the filling at the bottom half. Fold over the filling from the bottom, then fold the sides over, and then carry on rolling. Lay on a plate seam side down. The mint leaf should show through the rice paper quite clearly.
These were quite time consuming to make (so perhaps better for a weekend... or get a helper), and for some reason I steadily got worse at the rolling as time went on. I think I became impatient with hunger. The wait was worth it though; the rolls were crunchy, fresh, and reminiscent of summer. The singular mint leaf in each roll provided just the right amount of tingle without being overpowering.