That's basically a subversion of a Torta

Tortas are great, especially with steak, avocados, and onions, and cheese, and lettuce

Come to think of it, if such things as burritos and burgers are included here, I'd have to say my favorite is a tie between a classic, well made cheeseburger (not the sloppy fast food), and a good burrito with taco beef (ground beef cooked with certain spices), beans, shredded cheddar cheese, and medium-high salsa.

@goodgame: You ever try a Jucy Lucy?

Sandwiches encompass a lot of things

My definition of a Sandwich is:
Must have bread, flat bread, any kind of bread, doesn't have to be two pieces, can be just one piece
Must have some form of stuffing inside, and must be edible

Almost all sandwiches are western origin
USA: Cheeseburgers
Mexico: Burritos, Tacos, Tortas, Gorditas, Quesadilla
Mediterranean: Gyros
France: Croque-monsieur

Some people don't consider a hot dog to be a sandwich but this is just dumb
Sausage + Tortilla = Taco
What if you just use one sandwich bread and put a wiener in it, it's still a sandwich
Also,
Put ham and cheese inside a hot dog bun, and it's still a sandwich
A hot dog is a sandwich

Sausage sandwiches are a thing (done a few myself), so I’m completely with you on hot dogs being a sandwich.

Just had an idea: pizza sandwich. Place the pizza between garlic bread.

i agree with what goodgame said

Normally, though, when I hear sandwich I think of the typical food between two pieces of bread. There's a problem with English: some words have pretty loose definitions.

Sandwich is English
The name sandwich came from John Montagu, 4th Earl of Sandwich

Normally, though, when I hear sandwich I think of the typical food between two pieces of bread

Well that's cause the subgroup of sandwiches is called 'sandwich'

It'd be like having a subspecies of beetle called 'beetle'
you have ladybugs, stag beetles, rhinoceros beetle

but calling one just 'beetle' is the same the sandwich term did

Mine personally? I'm gonna say a Philly cheese steak

This is why you can assume OP meant 'sandwiches' as a whole, and not the specific subgroup

What does loose definitions even mean

You can say English has many definitions for a single word
Or than English uses a lot of metaphorical language to create different meaning for terms

Loose definition doesn't mean anything

Actually loose definition means that the exact meaning is unclear and/or not entirely agreed upon, much like what you say about figurative language. It's like with loosely defined borders to countries, there are borders, but it's not too clear where exactly they are.

No, sandwich isn't loosely defined, it just has multiple meanings
It's also a verb

^E.g. Being sandwiched - tightly packed between objects.

Sandwiched between massive khazar milkers

spaghetti sandwich