Once upon a time I lived in the USA. Other than my many excellent friends I have there, I can't say there is much about the place I miss. I don't think that the US is a bad place, rather it does not suite my taste as a place to live. As a place to visit, it was great, and in the years that I was there, I saw many of the fantastic sights it has to offer, and I do recommend camping in the south-western deserts.
There are only two things I miss about the US, neither technically native, but still they are both quite common. One is Mexican (&Tex-Mex) food, and the other is Pumpkin pie. Mexican is obviously Mexican rather than American, and the Pumpkin is a native of China and not North America, though it has been grown there since humans first arrived several thousand years ago.
It is now possible to get sufficient ingredients to make a half-decent Mexican meal in the UK, and Mexican style restaurants are starting to pop-up outside of London, so my Chili craving are now satisfied.
Today I made my first Pumpkin pie. Pumpkin is now common in the UK, and though very few people cook it - it's mostly for Halloween decoration, you can get quite nice eating Pumpkin. The recipe I found was dead simple, and the resultant pie is very nice. Not quite the same as ones I loved from New England, but good enough for now.