In small increments, add more sugar, citric acid, chiles, spices, and other ingredients to suit your own taste. 4 tablespoons kosher salt 1 1/2 teaspoons freshly grated lime zest 1 1/2 teaspoons freshly grated orange zest 1 tablespoon granulated or turbinado sugar 1/4 teaspoon citric acid Gently grind ingredients in a small bowl, using a bar muddler or mortar and pestle.