In a shallow bowl, combine the lime zest and kosher salt.
Rim the edge of a glass using a lime wedge and then dip the glass in the margarita salt. Set aside.
In a cocktail shaker, muddle the pineapple chunks and lime wedge.
Add the lime juice, tequila, pineapple juice and ice to the shaker and shake for 30 seconds or so.
Pour or strain into salt rimmed glass with ice.
Garnish each glass with a lime wedge and pineapple wedge or however you like. Serve immediately.