Once the chef has prepared the sauce and vegetables, she can start cooking. She should put a thin layer of oil into the wok and put it on medium heat. Once the oil is hot, she can add the tofu, garlic, and shallots. As they start to caramelize, she can add the noodles, tossing the ingredients so that they are evenly mixed. When the noodles start to brown, they should be pushed to the sides of the wok and an egg cracked into the middle and allowed to cook briefly before all of the ingredients are mixed together. The cook can then add the sauce and follow with the meat. The noodles should be soft and brown at this point, and the whole mixture will be warm and covered in the sauce. The chef can then add approximately 1/3 of the chives, cilantro, and bean sprouts, stirring the mixture briefly before taking it off the heat and serving it immediately.