I cannot imagine it any other way. Tuna, mayo, diced dills, a bunch of onion powder (not salt). On warmed, slightly crisped sourdough bread. Never toasted.
That is the One True Way of tuna salad sandwiches.
You tell 'er! Bravo @Seanette. 
Mine is shorter - tuna.
There is one place that I know of that does a tuna hoagie, not a tuna salad hoagie, as in they open a can of tuna & spread it on the bread instead of deli meats. When I go there, that’s one of a couple sandwiches that I like from them that make the rotation.
No, no, no.
Tuna, mayo, sweet relish, chopped celery and a touch of lemon pepper. Scooped up with Bugles or stuffed into a tomato.
Bugles? Bugles?
Dear god, where have we gone wrong? How have we failed dear @silenus to leave them in such a desecrated and degraded state?
Oh, the humanity!
Hehehe, my step grandmother introduced me to Bugles. That made me decide that grandma had a weird taste in snack foods, as I was definitely not a fan.
Hehehe, and my wife thought I was weird for just mixing tuna+mayo together and eating it.
yes
Well, there is other stuff on it, lettuce, onion, (optional) cheese, (a little) oil, seasoning. Just no mayo
Apparently, you can’t either if you think one puts mayonnaise on a Reuben. I do use mustard, though, cause I totally LOVE good mustards.
Hehehe, nah. The complete list for me is: tuna, mayo, preferably eaten on crackers.
CHEESE?? With tuna??
I think not. I know there is supposedly an abomination called a (ewww) tuna melt. I refuse to acknowledge its existence.
If God had wanted cheese and fish to go together, he would have given cows gills, or fish a stomach with four compartments.
We can agree (sort of) to disagree over the types of pickles that go with tuna 
, but cheese? No, sir. That crosses a line.
I remember when they were first introduced. To great fanfare and much advertising.
Per Bugles (snack) - Wikipedia, this was 1966 and I was 8. At the very center of the age demographic for loving very ersatz weird science creations misleadingly sold as food. This was also the same era that gave us so many other weird science snacking abominations. Tab & Fresca being two obvious items, but they were legion. I loved most of the weird science stuff; I was not a fussy or even slightly health-oriented little boy. Grease, salt, & science? Gimme gimme gimme …
So of course we influenced, yeah, that’s the word … influenced … Mom to get some for us. I, and literally all my fellow kids, thought Bugles were awful. They pretty much disappeared from store shelves, at least in SoCal, for at least a decade. Then made a slight comeback in a few markets. I started seeing them regularly again maybe 10 years ago.
Wiki says they’ve been continuously produced since 1966. But I don’t know where in hell they’ve been sold from the mid 70s to the mid 20-teens. Not where I’ve been. But I do know, having tasted one recently at a party, that they’re still vile. Even using my best recollection of kid-style tasting standards.
Hehe, my grandmother lived in Sacramento. Maybe she was in north California, keeping them in production single-handed.
I like apple in Tuna salad.
Celery I can live without.
Please, please no English peas in the tuna. Reminds me of hospital food.
I make my tuna salad with a little mayo, but I prefer it on the dryer side. Although I have both dill and sweet pickle relish on hand, for some reason I prefer sweet for tuna salad. Probably a comfort food thing. I dice a little celery into it, and liberally add pepper, with a touch of onion and garlic powder, and a sprinkle of marjoram. Just had some yesterday and it was delicious.
With your logic… a pickle can’t move on its own. A cow can go it the water but a fish can’t get near a pickle (cuke) on land on its own if it wants to live. So cheese gets closer to tuna than pickles do.
I mean, if you’re using Russian dressing or Thousand Island, there’s plenty of mayo there. I don’t know if that’s what was meant, but that’s the only thing that makes sense to me.
Nice logic. I’m impressed, don’t believe it but it was clever, I give you that. 
I’m not real big on celery anywhere.
I don’t think I’ve had apple in tuna salad, but mrs. dirtball will often put grapes in it. Cut 'em in half and sprinkle 'em in. Good stuff.
Logic? Who said anything about logic?
What about bagels with lox and cream cheese? Got a problem with that, punk?