Make a sandwich, whitey.
I think that there is a certain legitimacy to the lateral transfer of flavor from one junkfood format to another. Like, once pineapple got into a cheeseburger, it was going to end up on a pizza, right? And at least, in both cases, they were called "Hawaiian [food-format]". Although I never saw a pizza with teriyaki sauce on it, and I never had a Hawaiian burger with ham. (Although, that would be awesome.)
Now, somebody will come along and tell me that pineapple is not actually native to Hawaii or Hawaiian cuisine. Not the point!!
once pineapple got into a cheeseburger
Whose cheeseburger has pineapple on it? No cheeseburger that exists on any plate of mine.
Roy Rogers used to make a "double R bar burger" with ham. But not pineapple.
I've never heard of pineapple on a burger either. I'd try it. I love a salty/sweet thing. I love pineapple & ham on pizza.
Re. Hawaiin cuisine:
[link]
Hawaian beef with teriyaki, pinapple, swiss and bacon on ciabatta
This burger has been served at a nearby eatery.
Pineapple=icky squishy overly sweet
I'm not a fan.
Red Robin offers a teriyaki chicken burger with pineapple. But their chicken burger is really a grilled chicken sandwich.
If you deem Danish pastry pastry and theoretically can be used for pie, then we have a yeasted pastry precedent.
Well, there are several yeasty breakfast/dessert items -- most cinnamon rolls are made from a yeast recipe -- but a Danish or a cinnamon roll is not a pie. You can fold phyllo dough into a pie pan, and fill it with fillings, and that will not make it a pie. (Phyllo is not yeasty.) You can take raw pasta and dry it in pie-shape, and then fill it and cook it like a self-contained baked ziti, and that will not be pie.
I am so happy there is pineapple in my fridge