Well, start with Hummer americanus (aka Maine Lobster), wild rice, corn (maize to you), tobacco (pace Kipling).
I'm much an Anglophile (and appreciative of my own forebears contributions as sureties at Runnymeade in 1215), but the truth is traditional English cuisine is not much. Oh, some of the cheeses are superb, and there's wonderful fresh fish (trout, and Scottish salmon), but boiled beef, fish and chips, and steak and kidney pie do not a healthy cuisine make.
Of course, the upper classes never at traditional English food, being much influenced by France in matters of taste (and often speaking only French) from time of William the Bastard and his crew took charge of things.