Preheat your mini waffle maker according to the manufacturer's instructions until it's nice and hot.

In a medium-sized bowl, crack one large egg and whisk it thoroughly until well combined.

Add your well-drained tuna and shredded cheese to the bowl with the whisked egg, mixing until evenly distributed.

For an extra cheesy crust, sprinkle a teaspoon of shredded cheese directly onto the preheated waffle maker before adding the tuna mixture.

Spoon half of the tuna mixture into the preheated waffle maker, spreading it evenly, and cook for approximately 4 minutes.

Carefully remove the first chaffle using a fork or spatula and repeat with the remaining mixture.

Let the chaffles cool on a wire rack for a minute or two before serving.