Preheat your waffle maker on a medium setting for about 5 minutes.

In a small mixing bowl, crack one egg and whip it energetically for 30 seconds until fully combined and slightly frothy. Drain and pat dry the tuna, add to the bowl with shredded cheese and salt, and mix thoroughly.

Sprinkle approximately a teaspoon of shredded cheese onto the preheated waffle maker for an extra crispy base.

Spoon half of the tuna mixture onto the cheese in the waffle maker, close the lid, and cook for about 4 minutes until golden brown.

Open the waffle maker and remove the chaffle with a fork or tongs, set aside to cool, and repeat with the remaining tuna mixture.

Let your chaffles cool on the counter for 1-2 minutes before serving.