My wife makes tuna salad ....onion, celery, Mayo....Dukes of course, and chopped sweet pickle or relish and lemon,, salt and pepper
On usually white bread or whole wheat
Maybe crackers
Probably key is proper Mayo and best canned tuna you can afford
Albacore chunk at a minimum
Although I grew up on chunk light ....
Sounds good
If you ever see avacados cheap, try stuffing them with that.
Delicious