Spicy Beef Soup

In Korea, this is a very popular soup with taxi drivers and truck drivers, who stop for it at small roadside dives. My mother makes a really good version, but it turns out that she, like most cooks, finishes the soup with a bit of powdered stock or the flavor booster MSG. This version is pure and simple and from-scratch, and tastes just as good, minus the MSG—not that there’s anything wrong with a little MSG. This is meant to be eaten as a meal with a bowl of rice and banchan, includ