01 - In a small bowl, whisk together the lemon juice, agave syrup, lemon zest, vanilla extract, and turmeric until thoroughly combined and the agave syrup is fully dissolved.
02 - Fill two serving glasses with ice cubes, ensuring they are well chilled before adding the liquid ingredients.
03 - Divide the mock limoncello syrup evenly between the two glasses, pouring half of the mixture into each prepared glass over the ice.
04 - Pour 1/4 cup of chilled lemonade into each glass, distributing it evenly to maintain the proper flavor balance.
05 - Top each glass with 1/2 cup of chilled sparkling water, pouring slowly to preserve carbonation and create a refreshing effervescence.
06 - Stir each glass gently with a spoon to incorporate all ingredients. Garnish with fresh lemon slices and mint leaves. Serve immediately while cold and bubbly.