Let's see, we have done this twice but neither time did we quite hit all 11 countries. It's a lot of food, even split between two people who have big appetites, and specifically just getting appetizer portions.
2009: Mexico - nachos (good), Norway - lefse (meh), China - orange chicken (YUM)
Germany - bratwurst (good), Italy - frozen cappuccino (good), America - funnel cake (good)
Japan - didn't see anything that appealed to our starting-to-get-full bellies...saw some Pocky in the shops but didn't want something else sweet right after the funnel cake
Morocco - split a chicken wrap, which also came with couscous and lentil salad (good, sauce was a little watery)
France - basically the end since Canada has no QS and I have a fish allergy...got a chocolate eclair and an apple tart. Yum!
Canada - nothing, they need a QS location! Thought about buying some maple candy but passed.
UK - nothing, the Yorkshire Fish and Chips shop serves only fish, or chips fried in the same oil as the fish.
2010: Mexico - a frozen margarita...tried to start off a little lighter, haha!
Norway - sweet pretzel with almonds (too sweet for me!)
China - orange chicken again (bleh...did they change the sauce recipe?)
Germany - bratwurst (still great),
Italy - starting to get full, opted for alcohol instead...a Limoncello shot each, and one glass of Rosa Regale to split
America - nothing, still too full, and come on, it's America
Japan - DH wants to try sushi, I am allergic, and full enough from the brat to wait until Morocco. Turns out DH hates sushi (he tried it a couple more times after that in other places...nope, not a sushi fan).
Morocco - wanted to go with something we knew was good after the sushi, so we got the same chicken wrap plate as last year (sauce was still a little watery)
France - basically the end once more, for the same reasons as above - got their cheesecake and a strawberry tart. One of those big plump strawberry halves from the tart, plus a bite of cheesecake = best taste treat of all our World Showcase travels!
Canada/UK - nothing
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ETA: I see people mentioning items from TS places as well. Usually our "eat around the world" includes only what you can get from QS places, stand-alone kiosks, or candy from the shops, but we have had a few TS WS dinners that we enjoyed as well.
Nine Dragons - honey chicken, General Tso's dumplings are good
Les Chefs - onion soup is great, as are the profiteroles
Le Cellier - everything. At least, I haven't tried something that I disliked yet! Mushroom filet, cheese soup, bread, tomato stack app, chipotle chicken sausage app...mmm...