Watermelon Ginger Beer

Step 1

Divide the fennel fronds, if using, between two ice cube trays. Fill with filtered water and freeze until solid, 4 to 8 hours.

Step 2

Meanwhile, place the watermelon in a blender or food processor and blend until smooth. Scrape the sides of the blender or food processor using a rubber spatula and blend again.

Step 3

Place a fine metal sieve over a large bowl and strain the pureed watermelon through the sieve. (This should yield 2 to 3 cups of juice). Store in the refrigerator until ready to serve; it will keep in the refrigerator in an airtight container for up to 3 days.

Step 4

To serve, fill four highball glasses or rocks glasses with the ice cubes. Stir the watermelon juice and add ½ cup to each glass. Top off with ½ cup ginger beer.