subway question

what comes on a tuna fish sandwich.

I don't know about where you live, but here you can tell them what to put on or not put on any sandwich. While that is not a bad thing, I do not particularly like it at Subway because they advertise a certain sandwich with certain things on it but the preparers don't seem to know that. If I order something advertised with a certain sauce or cheese or whatever then that's what I want. I don't want them asking what sauce I want on it or if I want cheese. Although having the option to change it is nice.

thank you very much.

Where I live, you can tell them exactly what you do or do not want on the sandwich. I think that's pretty much the case everywhere.