Here is the step for simple sandwiches. Its very easy. Even with less effort, it can be done.

 
Photo from Google



Ingredients:

1 can of tuna in water -- can buy this in any supermarket
1/4 tablespoon of black pepper & salt
4 to 5 spoon of mayonnaise -- can add to your preference
Sandwich bread
Fresh salad leaves
Carrot or Tomato -- sliced (dice)


How to make it:

1) Flake the tuna into chunks. 
2) Mix the mayonnaise with the tuna. 
3) Add the sliced carrot or tomato into the mixture (carrot will give natural sweetness to the tuna)
4) Add the black pepper & salt -- follow your taste preference
5) Spread the mixture (tuna + mayonnaise + other ingredients) on your bread.
6) Enjoy your super simple Tuna Sandwiches.