In a quart container, mix together the water, sugar, and fresh lemon juice until the sugar has dissolved.
Fill a tall glass 2/3 to 3/4 full with the lemon mixture.
Top the glass with sparkling water.
If desired, add pureed fruit with a little superfine sugar before adding the lemon mixture for an exciting flavor variation.
Notes
For a fun twist, try pureeing some of your favorite fruits like raspberries or strawberries with a bit of superfine sugar and adding it to the glass before pouring in the lemonade mix. It adds a delightful extra flavor and color!Use fresh lemons for the best taste; avoid bottled lemon juice for authenticity. If you want a sweeter drink, adjust the sugar to your liking.