While I was in London, my tour group went to a pie shop. There, I ate a delicious pasty and a box of Ribena, blackcurrent juice drink.
Ribena
Ribena
Ribena
So, now I want Ribena. But, availability in the states is limited to the bottles of concentrate. As hard as I try, I can never get the concentration right when I make it myself.
I also like Ramune.
As for American foods, I like pumpkin pie and popcorn. Those are the only truly American foods I can think of.