With the fresh flavors of summer, this is a cooling drink to serve for sipping in the hottest months. Make it up to a day ahead and serve it as an alcohol-free drink or with your favorite alcohol added for a refreshing cocktail.
0 Make a simple syrup by combining 1/2 cup sugar and 1/2 cup water in a small pan over medium-high heat. Heat the liquid just until the sugar is complete dissolved, 5-6 minutes. Set the simple syrup aside to cool.
1 Pulse the watermelon in a blender until smooth. (You may need to do this in 2 batches.) Strain the pureed watermelon through a fine mesh collander into a large bowl. Discard the pulp and rinse the blender container out with water.
2 Return the watermelon liquid to the blender. Add the lemon juice and mint and blend until the mint is very finely chopped. Transfer the Watermelon Mint Lemonade to a juice pitcher. Slowly adjust for your desired sweetness by adding simple syrup to the lemonade. (I found that I needed only about half of the simple syrup, but depending on the sweetness of your watermelon, this may vary.)
3 Chill until serving. Serve over ice, with lemon slices and fresh mint as a garnish.
