The perfect salve for cold winter days, this vegetarian noodle soup can be cobbled together in an instant from the contents of a well-stocked kitchen. It takes its flavor from a quick bouillon using just four ingredients: soy sauce, sesame oil, scallions and shiitakes, which deliver a hefty, flavorful dose of glutamate. Poached eggs add richness to the clean and comforting broth. Fresh eggs have stronger, firmer albumen (egg whites) and will thus hold their shape better than older eggs…