I was told by a friend that they ordered “teriyaki beef and wasabi potatoes” and a red flag went up.

Okay, “teriyaki” is Japanese – but it’s moved from a traditional cooking form to a flavor/seasoning that is bandied about like “ranch” is here. I concede teriyaki beef is still the provenance of the Japanese; as for wasabi mashed potatoes, I can’t be so lenient.
I am sure that mashed potatoes have been served in Japan for some time now but mixing wasabi powder [a dyed-green pulverized horseradish extract facsimile meant to resemble the rare root found in mountain streams Wasabia Japonica] into the spuds as a common practice? I think it is safe to say it is more likely that one might find peanut butter or Kraft Dinner in a Japanese pantry than seeing green spicy taters in Tokyo. [link]

So the question is – wasabi mashed potatoes is to Japan like:
the Croissan’wich® is to France?
the fortune cookie is to China?
the Olive Garden is to real restaurants?

Do other countries have spoofs of our food?
I asked snuff and we came up with:

-Louisiana Blackened Steak with Ranch Rice
-Chicken Fried Steak with Salsa Popcorn
-Meatloaf with BBQ Sauce Plantains
-Hotdog with Mayonnaise Corn