Place the rocks ice into the champagne saucer
Pour 0.75 oz of simple syrup, 0.75 oz of lime juice, and 0.5 oz of grapefruit juice into the shaker
Add 0.35 oz of Campari, 0.75 oz of Lillet Blanc, and 1 oz of silver tequila
Fill the shaker with ice cubes and shake
Strain into the champagne saucer
Garnish with grapefruit zest