| In a saucepan, bring sugar and 2 cups of water to a boil. Stir until sugar dissolves. Boil uncovered for 5 minutes. Stir in lemon juice, lemon zest, and mint leaves. Remove from heat, cover, and let stand 30 minutes. Strain lemonade into a 2 quart pitcher; stir in remaining 2 cups of water. Cover with plastic wrap and let chill at least 2 hours. To serve, fill pitcher with ice cubes, stir in extra lemon slices and mint sprigs, if desired. Makes 1 1/2 quarts. | 
