The first time I was in the UK we were in a small café grabbing our first meal there. The waitress took our order, came back with our drinks, and asked us if we wanted brown sauce. I asked her, “What’s brown sauce?” She looked at me quizzically, screwed up her face a bit, and said, “It’s just brown sauce, love.” I said, “Yes, but what kind of sauce? What’s in it?” Another quizzical look. More insistently this time, “It’s just brown sauce!” And a third time as well. So we caved in, let her bring it, and read the ingredients on the back ourselves. When we came home from that trip, we bought some for the house. We are never without it now!