I don’t necessarily mean specific recipes, I mean concepts. A western sandwich is bread, (vegan) meat or cheese, sauce, tomato, something pickled, some salad, mostly, all layered and/or thinly sliced. Cross out maybe some of them for simplicity, like the mayo tomato or the british cheese and cucumber.
A döner kebap is sort of layered but everything but the protein layer is more of a mix up and not like tomato followed by onion or whatever.
A Banh Mi is sort of western of course, but it does a twist. The layers are there-ish, but they don’t matter so much. Sort of a hybrid between something like a kebap and a pita if you catch my drift.
What other sandwiches are there, conceptually?
A multi layer beam dip is not a sandwich until it’s on a chip. A bread bowl is a sandwich in form but not function and therefore doesn’t meet the criteria. Unless you’re picking that shit up and munching it in from the side and getting soup everywhere, which means you aren’t eating the soup which means eating it as a sandwich is not eating the food as intended and is therefore not a sandwich, this is called formalism. The resulting bread after the soup is mostly eaten is closer in function to the sandwich but bread with something soaked in is getting a bit too far removed. Gravy is a sandwich under those rules.