1 1⁄2 oz Reposado Tequila
3⁄4 oz Aromatized wine, Cocchi Americano
1⁄4 oz Herbal liqueur, Green Chartreuse
1 twst Grapefruit peel (as garnish)
Stir, strain, up with a grapefruit twist.
I increased the Green Chartreuse to 1/4 oz -- Stewart calls for a dash. Stewart's version calls for Lillet Blanc, but the Cocchi Americano provides more balance. Your mileage may vary.