umm, ur supposed to eat the naan with a kabab, tawa chicken and any other curry(salan) or chicken. naan is not eaten alone similarly rice can also be eaten with the chicken or kabab or any kind of other curry
Thankfully, this tube food isn´t used anymore. It didn´t last long because it´s very inefficient. Ausronauts nowadays have a lot more variety than that. (Please correct me, if I am wrong in any way)