Beef tongue with red onions, tomato and spicy mustard on pumpernickel.
Outstanding.
They do not have them at Jason’s.
I always want a reuben but I have high standards and am afraid of being disappointed. So, roast beef and cheddar on some kind of cheese-crusted bread please. With tomato and onion.
Right now? I’d order a nice roast beef and cheddar on a kaiser roll, with regular mustard, thin tomatoes, pickles, slight red onion, and a little oil and vinegar.
At home, if I could have the materials to make any sandwich I could, I’d do a liverwurst and cheese with yellow mustard on seedless rye. I make them better and more to my taste than a deli around here would.
Joe
Montreal smoked meat on rye. Or a Reuben.
Funny, that no one listed Pickle Loaf on their dream deli sandwich. 
My mom made pickle loaf sandwiches when I was a kid. <shudder> I had to eat those nasty things or get sent to my room for an hour.
HOT pastrami on toasted rye, swiss, spicy mustard and pickles. With a side of slaw please.
Capicolla, Mortadella, Salami, and Provolone with hot giardiniera (or equivalent.)
If I don’t see something else interesting on the menu, a Reuben is my default order.
So many choices of meat! I don’t know what to pick. For me, I think the only constant would be Swiss cheese (although with roast beef, I’d go also go with chedder).
Bread: always sourdough (if available). Otherwise, in order of preference, French, wheat, or rye.
As for condiments, I’d go with sweet hot mustard if I picked turkey or chicken and either brown or regular yellow mustard for everything else (and maybe a little pure horseradish for roast beef).
No mayo ever (I’m allergic).
If I order anything else, it’s on the side.
Chunky chicken salad with melted swiss on sourdough toast, or a BLT with avacado. Mmmm.
Thanks guys, now I’m hungry!
I used to hollow out a loaf of something crusty, pile in the deli meats, cheeses, various pickled vegetables, sriacha, and put it in the oven until I couldn’t stand the yummy smell ONE SECOND MORE and pulled it out and dug into it like a starving hyena.
Haven’t done that in a while, hrm.
Otherwise it depends what’s on the menu. I like Reubens, except Schlotzky’s, gross. Something about their bread is just…gross, to me. I want REAL BREAD, damnit.
I don’t make sandwiches at home, ever, except for the aforementioned monstrosities, (and of course the bi-annual peanut butter-mayo-pickle sammich) and in fact don’t even use bread for burgers or dogs. But put me into a deli and you’d think that was ALL I ever ate.
Tuna on rye with mayonaise, pepper and onions. Also has the benifit of keeping your co-workers away from you during afternoons.
Roast beef on white (challah if they have it) with mayonnaise. My husband would have a Reuben.
If they have grilled sandwiches, a grilled Swiss on raisin bread with a side of slaw and chips. If they don’t, tuna on toasted seeded rye, slaw and a sour pickle spear, rare roast beef on a seeded kaiser roll with course brown mustard, a pickle spear and slaw or chicken salad on toasted challah with a cup of chicken noodle soup and fruit salad.
Now, time for lunch.
BLT is my go to sandwich if the tomato looks good. Failing that, bring on the corned beef and a L-I-G-H-T touch of spicy mustard, no cheese please. Either sandwich goes on a nice toasted multigrain bread. Whole dill pickles on the side. If it’s not too sweet, cole slaw can go in a separate dish
Last time I got Roast beef & brisket, white cheddar, coleslaw, with Russian dressing grilled on Jewish rye. It was seriously nom.
Are you me? The only thing I would add to that would be onions.
The Reuben with a big kosher dill pickle, and extra dressing on the side. I’ve eaten Reubens just about everywhere. Love 'em.
Same here. Or if they have it, Chicago Hot Italian Beef - Classic Chicago Italian Beef Sandwich Recipe As Seen On Hulu's "The Bear" - Meathead's AmazingRibs.com
These fine folks have the right idea.
Hot pastrami on toasted rye with swiss cheese, a slice of lettuce, and brown mustard. Potato salad or slaw on the side.