Ok, if when it happens you just tell it, it does rewrite it better. Not always human coworkers can do that :)
Yes, there’s always flies in the soup, and sometimes they just serve you a whole plate of insects, but you can’t beat the price. Just ask the waiter to get you a soup with less flies, and keep doing that until the number of flies is acceptable to you.
How about, no thanks, I’ll go to a real restaurant.