Step 1.
- Blend the watermelon until smooth, then strain to remove pulp if desired.
Step 2.
- In a shaker, combine 2 oz of tequila, 2 oz of watermelon juice, and 0.5 oz of fresh lime juice.
Step 3.
- Add ice to the shaker and shake well for about 10 seconds.
Step 4.
- Strain the mixture into a highball glass filled with ice.
Step 5.
- Top with soda water to taste.
Step 6.
- Garnish with a sprig of fresh mint.