Step 1.
- Cut the starfruit into slices and set aside for garnish.
Step 2.
- In a shaker, combine the tequila, lime juice, starfruit juice, and agave syrup.
Step 3.
- Fill the shaker with ice and shake vigorously for about 15 seconds.
Step 4.
- Strain the mixture into a cocktail glass filled with ice.
Step 5.
- Garnish with a slice of starfruit on the rim.