You'd be surprised to find out how many don't know how to make tuna salad. I have added pictures that show the steps pretty simply and the ingredients plus directions.
2 cans chopped tuna (in water)
4 eggs boiled (ten minutes
1/2 medium onion chopped
1 large kosher dill pickle chopped
Salt and pepper to taste
1/3 to 1/2 cup light mayo (according to taste)
White or wheat sandwich bread - toasted if wanted.
Drain water off cans of tuna and place in mixing bowl
In a sauce pan cover 4 eggs with water and bring to a boil. Turn down to medium to low heat and cover and boil for 10 minutes. Run cold water over eggs until cool enough to peel off shell...rinse and coarsely chop.
Add remaining ingredients (except bread of course) and stir thoroughly (start with less mayo and add more as you feel is needed.
Put a generous portion on sandwich bread and serve with soup and/or chips.