The tea slushies are one of my husbands favorite items at epcot. The egg roll is good as well. The joy of tea stand sells a couple of food items and the ones we have tried were good. If DH were gettingv one item it would be the peach tea slush.
Peach tea slush is something I have my eye on. Thanks for the recommendation.
I think you should share what you already ate! To be completely honest, I haven't eaten in many of the countries, especially snack items.
Here's what I had this year. I liked everything I had:
Table service:
Italy: Via Napoli (my favorite!) Quattro Formaggi Pizza, tiramisu & strawberry aqua fresca.

Mexico: La Hacienda de San Angel: Pescado a la Talla (the tilapia dish). Really enjoyed this meal, loved the black beans. Empanada de Manzana (apple turnover w/ice cream & caramel) was good, too. I'm trying San Angel Inn next time, but I would happily return to La Hacienda.
Counter service:
UK: Fish & Chips from the Yorkshire County stand - another favorite!
Morocco: Lamb Shawarma Platter from Tangierine Cafe - my newest must-do-again!
France: Ham & cheese croissant and apple turnover from Les Halles Bakery
Snacks:
Japan: Rainbow Kaki Gori from Kabuki Cafe
Norway: Sweet pretzel with almonds from Kringla Bakery
Germany: Milk chocolate covered caramel with sea salt from Karamel Kuche
I think that's everything.
I have an ADR for Le Cellier (first time there) for my next trip so I can check Canada off the list, and I figure I'll grab a Mickey pretzel or a funnel cake in the US at some point.