In the past when you enter Epcot they have Passports, usually I think near where the times guides and maps are. The Passports list all the food in the different booths. There is a little box next to each food and you can check it off when your order it. In the past, they also used to stamp the Passport - like a real Passport - next to each country food booth. I believe starting last year they gave you stickers - in the middle of the Passport - so you could put the stickers on yourself.
As far as the size of the items - they are small appetizer size portions. My DH and I usually split the items and make our way around World Showcase sampling all the different offerings - just like at the Food and Wine Festival. Prices are probably a little high but we love all the different assortment of food we get.