Plug in your mini waffle maker and let it fully preheat.
Crack the egg into a small bowl, add the mozzarella and garlic salt, and whisk until well combined.
Lightly spray the waffle maker, pour in half the batter, and close the lid. Cook for 2 to 3 minutes until golden.
Gently lift out the chaffle and repeat with the rest of the batter.
Notes
Let the chaffles cool for 1 to 2 minutes on a wire rack after cooking to ensure a crispy finish. For a sweet version, swap garlic salt for cinnamon and vanilla.