Their lies go on and on all the time
We usually seem to inquire from the waiter or the waitresses about some particular dish on the menu and whether they like it or not. They may tell the truth. Because there is no reason to lie if they like the dish, but if they don’t, they would just lie about it. As it is obviously going to look bad if they tell the truth. But sometimes they often get out of that situation by saying that it’s the most popular dish on the menu.
It probably means that they don’t like the dish and are just covering up for your question. Sometimes If they don’t like that particular dish, they would end up recommending something else; similar to that dish that they would personally like to have. Not a bad way of communicating with the client!