I know you are doing Tutto for Dinner, I like it for lunch on a nice day. They have outside dining and you can get some appetizers or dessert if you do not feel like a full lunch. It is a lovely spot and fun to people watch, on a nice day.
I like the mango green tea in China, the tea/snack stand next to the lagoon. They have alcohol and non options, very refreshing.
Karmel Kuche for a sweet treat in Germany, they are all good. I like just a simple caramel no nuts.
The gelato outside of the Italian Pavillion.
Anything at the French Bakery. I lilke the Pithiviers, an almond flavored pastry. For a savory treat, the cheese plate is quite nice and can be split.
I am sure you will find something for everyone.
Almost forgot, the crepe stand in France!