From Cook's Country TV. Some notes: 1) This method is to avoid the washed-away flavor of boiled potatoes. 2. The purpose of the sugar is to mimic that sweet flavor without oven roasting. 3) Cut the potatoes into small pieces to allow more surface area to soak up garlic flavor and to promote even cooking. 4) ...and most importantly, to eliminate excess starch, which produces gluey mashed potatoes, give the raw, cut russets a good rinse under running water before adding them to the pot to simmer.