wide noodles in Xian Moslem Street.

Yesterday I went to a noodle restaurant at the Muslim Quarter, on the busy street. The most expensive item was 38 RMB "high quality mutton noodles". I liked the noodles, but the taste was quite sour and the mutton was cold and fatty. I was not very satisfied. Yet, I saw other customers having wide noodles, they were like pasta sheets, in a red sauce. I tried to ask what it was, but could not get a response in English. Was that the beef noodle?