Open can of tuna

Pour tuna into a round bowl

Add four big scoops of mayonnaise

Mix mayo and tuna together until it looks pink and white all together and you got a nice texture. (You can make two sandwiches with one can)

Grab two slices of bread and place them in a plate

Gently place the slice of cheese on one of the bread slices

Put the tuna mix on the slice of bread with cheese (not too much)

Close the sandwich

Turn heat on stove (not too high, not too low) and place butter on pan. Let it sit and melt until it is nothing but sizzling liquid

Place sandwich on pan. Let one side sit for about 6 minutes, then flip so the other side can cook. Bread must look brownish and hard.

Serve ;)