In Hammersmith/brook green the international food aisle seemed to have lots of american stuff, including
Tropical Punch or Strawberry Koolaid
Cream of Wheat
Canned black beans
Different types of tortillas
Different grades of cornmeal
Big tubs of french fried onions
um...it did have other stuff but that's what I bought for the boy. I'll check next tme I go.
And lots of other good stuff, loads of different soy sauces and sambals, jerk seasoning and those mixes for covering fried chicken, much better than a normal tesco international food aisle - had loads of things from my childhood (asian mother) like White rabbit rice sweets