Combine water, limeade concentrate, lime powder and juice squeezed from limes. Stir briskly until dissolved. Add wine and Triple Sec, cover and refrigerate for at least 1 hour before serving. To create a frothy marguerita combine the whites from 2 eggs with 6 servings of the marguerita and whip in a blender for 2 or 3 minutes. [yes, the recipe does say to put in the egg whites. Is this safe? What else could be substituted to make a froth ? Just buzz in the blender with ice chips?]
