Protein sandwich with mock tuna and egg bread

Grind the tuna, the egg with the egg whites, spices to taste and yeast until it becomes a practically liquid mass.

Pour the dough into a microwave-safe tupper and cover it with plastic wrap. In my case in a Lékué case. And at maximum power for 3 minutes approx. depending on the microwave, take out, check that it is done and turn it halfway around and another minute.

When we have it, let it cool a little to be able to cut (better if it is a serrated knife).

We put it in the toaster until it is golden brown and fill it with whatever we like! You can hardly notice that it tastes like tuna, but I recommend filling it with cheese, spinach type vegetables, etc.