In a saucepan, combine the sugar, zest and juice. Bring to a boil. Remove from the heat and stir until the sugar has dissolved. Pour into a pitcher and refrigerate for about 2 hours. Strain if desired.
Just before serving, add the mineral water to the citrus syrup.
Put 3 ice cubes in each of 6 highball glasses. Partially fill the glasses with the syrup mixture, then top off with red wine, pouring gently to create two distinct layers. Stir before drinking.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.