1.5 oz gin
0.75 oz italian vermouth (carpano antica)
1 oz lemon juice
0.75 oz simple syrup
dash Angostura bitters (no more)
Lemon peel garnish
Shake and serve in ice-filled highball glass. Dale Degroff's recipe includes club soda in a collins glass, but why would you want to dilute something that tastes this good.