1. Preheat oven to 325°.
2. Place egg whites in a medium bowl; lightly beat with a whisk. Add sugar, vanilla, salt, and cardamom; stir well with a whisk until foamy. Add coconut; toss well to combine. Loosely pack coconut mixture into a 1-tablespoon measuring spoon. Turn out onto a baking sheet lined with parchment paper. Spoon remaining coconut mixture by tablespoonfuls onto prepared pan to form 20 mounds. Bake at 325° for 23 minutes or until golden all over. Cool on pan 3 minutes; cool completely on a wire rack.
Make-ahead tip: Bake cookies, and cool completely on a wire rack; store in an airtight container at room temperature for up to a week.