Prepare the Watermelon Puree: In a blender, add the cubed watermelon. Blend until smooth. If you prefer a smoother drink, strain the mixture through a fine-mesh sieve to remove the pulp.

Mix the Ingredients: In a cocktail shaker, combine 1 cup of the watermelon puree, tequila, grapefruit juice, lime juice, simple syrup, and a pinch of salt. Fill the shaker with ice.

Shake It Up: Secure the shaker lid and shake vigorously for about 15-20 seconds to chill the mixture and combine the flavors.

Prepare the Glass: Fill a glass with ice cubes. Strain the cocktail mixture over the ice.

Top with Club Soda: Gently pour club soda over the cocktail to fill the glass and give it a refreshing fizz.

Garnish and Serve: Garnish with a slice of watermelon and a lime wedge on the rim of the glass. Enjoy your refreshing Watermelon Paloma!