In a medium saucepan over medium heat, combine sliced jalapeños, sugar, and water. Stir constantly for about 5 minutes until the sugar dissolves and the mixture begins to simmer.

Remove from heat and strain the syrup through a fine mesh strainer into a bowl, discarding the jalapeño pieces.

Run a lime wedge around the rim of your serving glass, then dip the rim into salt or Tajin.

In a cocktail shaker filled with ice, combine jalapeño syrup, lime juice, and orange juice. Shake vigorously for about 15-20 seconds.

Carefully strain the mixture into the prepared glass filled with ice. Garnish with lime wedges and fresh jalapeño slices if desired.