One of my favorite things to do when friends visit us in Beijing is to take them on a morning walk to look for breakfast. It’s a great way to start the day in Beijing — there’s a buzz in the air as everyone is hurrying off to work and the city comes alive. Breakfasts carts abound everywhere, but they are particularly plentiful near subway stops. And if you happen to stumble upon a busy food street, with stalls and hole-in-the-wall …