01 - In a small bowl, whisk together the lemon juice, agave syrup, lemon zest, vanilla extract, and turmeric until thoroughly combined to create the flavored syrup base.
02 - Fill two serving glasses generously with ice cubes to chill the drinks properly.
03 - Divide the mock limoncello syrup evenly between the two glasses, pouring half into each prepared glass.
04 - Pour 1/4 cup of lemonade and 1/2 cup of sparkling water into each glass.
05 - Stir gently to blend all the ingredients. Garnish each glass with fresh lemon slices and mint leaves. Serve immediately while cold.