Make the mint syrup: Stir together sugar and water and bring to a boil in a small saucepan. Boil for about a minute, then remove from heat and toss in mint sprigs. Let mint steep for about 10-15 minutes to develop mint flavor. Press on mint leaves to extract the last of the flavor, and discard.

In a pitcher or desired container, stir together lime juice, lemon juice and cooled mint syrup. Add about 1 ½ cups of water to dilute. {This is where you may want to start tasting and deciding how strong you prefer it to be.}

To serve, pour limeade into a glass filled with ice {about ½ to ¾ of the way full}, then top with lime sparkling water. Garnish with a lime wheel and mint if desired.