1 T. minced lemon zest
1 T. minced lime zest
1 T. minced orange zest
1/2 C. sea salt, kosher salt or grey salt

Preheat oven to 200F. In a small bowl, stir together all the ingredients, then spread the mixture on a small rimmed baking sheet. Place in the oven to dry for 2 hours. Remove from the oven and let cool completely. Pour the mixture in a mini processor and process until finely and evenly ground. Store in a tightly covered jar for up to 2 months.