Place the coconut flour and baking powder in a bowl and mix. Add the pizza seasoning and the egg, then stir well. Shape the dough into a pizza base on a baking tray. Spread tomato paste over it, and then add more pizza seasoning on top.

Then, place the tuna on top and put it in the oven at a high temperature. Once the color of the dough changes, remove it, add the mozzarella cheese, and return it to the oven at a high temperature.

Wait until the cheese has melted, then remove it from the heat. Serve once it has cooled slightly—enjoy!