Plenty of food shops in London have sections catering to American immigrants. The busiest times converge around three American holidays: Independence Day, Thanksgiving and Christmas. Christine Ro/NPR hide caption toggle caption Christine Ro/NPR The Salt In London, The American Food Aisle Is Filled With Nostalgia And Preservatives January 26, 2018 To Americans abroad, comfort food so often looks like junk food. Shops in London are filled with items from Hershey's, Aunt Jemima and Betty Crocker. But Kellogg's Pop-Tarts seem to rule them all.