Adjust oven rack to middle position and preheat oven to 350 degrees F. Line baking sheet with parchment paper. In a medium bowl, whisk together egg whites, sugar, vanilla, and salt until frothy. Gently stir in coconut. Wet your hands. Use a teaspoon to put one rounded teaspoon of the mixture into your hands. Roll mixture into the ball, then pinch the top. Place macaroon on baking sheet. Repeat with remaining coconut mixture. Bake macaroons until just golden on top, about 15 minutes. Let cool 5 minutes then transfer to a wire rack to finish cooling.
