Toast bread to 5C. Set aside.

Into a small bowl, empty the can of tuna with a fork. 

Stir in the mayo. Add more to taste if the tuna still seems dry. 

Spread the tuna on one slice of toast. Using the fork, press down and spread the tuna to the edges.

There should be enough tuna mixture leftover for another sandwich. If you’re only making one sandwich, move the mixture to an airtight container with a lid and put it in the fridge.

If your tuna sandwich is going mobile, don’t add it to the bread until it’s time to eat it.