Elastic enough that it seems common to call subs fast food, but except for Subways (which i despise, so i never eat there) i don’t think of them as fast food. I think of them as the related category, “sandwich shop”. But leftover pizza is better than leftover subs anyway.
Fried chicken is often fast food. And i do like fried chicken. But the idea of eating it leftover is pretty unappealing. Either it would be cold and have an unappealing texture, or reheated, and taste reheated.
It’s already stipulated that cold pizza (along with fried chicken) is the gold standard in leftovers for breakfast, but if you want kick it up to platinum, all you have to do is crack an egg over the slice and stick it under the broiler for a minute or two.
'Round about where I live, we have a small number of gyro places that have appeared in the last few years. They have all the ingredients laid out Subway-style, and you tell them what you want, and they scoop it up and plop it on as you order. Even if a gryo isn’t what you traditionally think of as fast food, that setup is most assuredly fast food in function. If you get a “platter” (as opposed to just the sandwich), they heap a very generous serving of rice on it as well, and you end up with enough to have some now and the rest later unless you’re just flat-out hungry.
The leftover portion, in my opinion, refrigerates and then reheats quite nicely.
[Moderating]
Clearly not, or you wouldn’t have responded to it. You just chose to respond to it in an impolite way that does nothing good for the tone of the thread.
Let’s keep things civil, shall we?
Mostly ditto. Except I don’t even think of Subway as food. That stuff is not good enough to feed to starving homeless folks.
Reheated? When was it ever heated in the first place?
And why does the OP give the impression that all sub sandwiches need to be heated?
I think a breakfast burrito wins this. It’s fast food, I can get it in a drive thru and they are normally gigantic. They make 2 generous or 3 reasonable breakfasts for me and if they are well-seasoned, they taste better the next day.
I also like to get a Del Taco salad and split it up between two meals but you have to eat all the guacamole the first day or its brown but otherwise, as long as you don’t put dressing on it, its a generous amount and basically healthy.
Mr. Sub uses meatballs that are served warm. Also, most customers opt to have their sandwich microwaved (gawsp!)^ or “toasted”. At Subway “toasted” means quickly broiled to soften the cheese and harden the bun. At Mr. Sub “toasted” means a panini press that greatly increases the filling to bread ratio by flattening the bun to a thickness of 1/3” or so. I understand some like their subs cold. They might not live in Canada.
^Microwaves remind me of Ivan Decker.
I have invented a machine! I call it a microwave! It cooks food almost instantly!
Wow, that’s amazing. Does it do a good job?
No! It makes some parts boiling hot while leaving other parts frozen. And it explodes if you put the wrong things in it.
I usually dice leftover french fries and make skillet hash browns out of them. I’ve done it with fries even three or four days old, and they’re always good.
Succintly: Thick pat of butter in a pan, add in a handful or so of trinity, stir for a few minutes. Add another pat of butter, let it melt, then throw in the diced french fries. Salt/pepper/garlic/herbs to taste (sage is very good in this). Add crumbled sausage if desired (completely optional). Keep moving the potatoes around, mixing in the trinity well. After a few minutes this, they’re ready to eat.
Admittedly, it’s not a particularly health-conscious breakfast – being that you’re adding more fat & salt to something that already was cooked with fat and salt. But the end result is divine.
That actually sounds very tasty. Might try it.
Also very good.
There’s just as much bread as ever. It just looks smaller. Which can fool people into thinking they’re getting a sandwich with a good filling to bread ration when they are not.
But panini-ifying a sandwich is generally an improvement, if nothing else for the fact it’s hot. So I’m all in with you there.
Oh good grief. There are hot subs (like meatball subs), and there are cold subs (like cold cuts). FWIW, I certainly haven’t picked up any suggestion in this thread that the latter need to be heated or reheated.
I would agree, but what fast food places serve a breakfast burrito at night?
I live near Las Vegas, we have many fast food Mexican places that serve them all day though I didn’t really think it had to be a dinner only item?
That’s a good idea, order a sub but skip the condiments and it add later. I choose V/O too. I’d probably skip the lettuce and tomato as that would wilt and go soggy.
Soups stews and chilis are often better the next day but the OP asked for a sandwich, 
I’ve eaten cold grilled cheese it’s alright.
Meatloaf sandwich for sure is good but using leftover meatloaf on fresh bread. But iv eaten leftover ML sandwiches too.
Another vote for fried chicken and pizza, but they have to be reheated properly. Fried chicken is reheated on a wire rack in a 400 F oven for 10 minutes. Pizza is reheated in a covered skillet over low heat until the top is at the desired temperature, usually about 15-20 minutes. Using a microwave on either is a cardinal sin which is punished by being forced to eat soggy chicken or gummy pizza.
Sure, bread doesn’t disappear and nothing extra was added. The density of the bread increases. I was talking in terms of measurements, but of course you are right in terms of physics. Maybe panini presses reduce sandwich entropy. Still, a lot of things about eating are psychological.
I have found the convection setting of air fryer toaster ovens does a good job with fried chicken, and also reheats pizza well (use the highest temperature). The skillet works well too. Microwaves are mostly for popcorn, melting butter and defrosting and would be very mediocre at making delicious pizza or sandwiches.
I would think meatballs would do well on a second day, but the bread would be soggy. Same concept as meatloaf being better on the second day. But fastfood meatloaf sub? Not as good as one from a sit-down Italian-American restaurant.
I had a coworker who would stock up on BigMacs when McDonald’s had a buy one get one free deal. This was in the 90s. He would stick them in the freezer and reheat them. Not for me.
