What is Menudo?

A few years ago we did a Mediterranean Cruise and flew down to Malaga for a week after the Cruise. We had rented a car and driven around all day. Kathie is always hungry. We go into a restaurant to get something to eat before we go back to the resort. I ordered shrimp and Kathie asked if they had beef soup. They brought the soup out and the beef was tough trying to chew it- she realized it was tripe which she does not like. She told me that I could not have any of the crackers and bread. The menu only said beef soup. It's a laugh for us now when we see tripe.