Shake for about 15 seconds until the shaker feels icy cold.
Fine strain into a chilled martini or coupe glass.
Garnish with a pineapple wedge or lime wheel and serve immediately.
Notes
Use unsweetened pineapple juice for cleaner balance; add a touch of simple syrup if you prefer sweeter. Chill the glass before pouring. Optional: rim the glass with fine sugar to play up the sweet-tart profile.