Beat egg whites and sugar together until fluffy. Use a whisk attachment for a stand mixer or a hand mixer. It will take 1-2 minutes until nice and fluffy.
Mix in the salt and vanilla extract until well combined.
Gently fold in coconut until everything is well blended.
Drop about 1 inch balls about 2 inches apart on a baking sheet. Bake for 18-20minutes until set and the the edges are browned.
The cookies will spread during baking. Remove from the oven and let cool for 10 minutes. Then use your fingers or the sides of 2 spoons to gather the edges and shape into balls.
Once the cookies have cooled completely, dip the bottoms in melted chocolate (or drizzle chocolate over the top).
Place on parchment paper to let the chocolate set completely before serving.