Start by preheating your waffle iron according to the manufacturer's instructions.
In a large mixing bowl, whisk together the all-purpose flour, kosher salt, sugar, baking powder, and baking soda.
In another bowl, whisk together the buttermilk, eggs, melted butter, and vanilla extract until well combined.
Pour the wet ingredients into the bowl of dry ingredients. Gently mix until just combined.
Fold in 3/4 cup of the sweetened coconut flakes, lime zest, and lime juice.
Lightly grease the preheated waffle iron and pour the recommended amount of batter onto the hot surface. Cook according to your waffle iron's instructions.
Carefully remove the waffles from the iron and place them on a wire rack. Top with remaining coconut flakes, fresh fruit, or maple syrup.