This hearty meal-in-a-bowl soup is a perfect antidote to even the coldest of winter days. In Japan, restaurants and many homes have individual nabé casseroles made specially for cooking and serving this and similar dishes. These glazed ceramic casseroles can withstand the heat of direct contact with burners. Occasionally I’ve seen these Japanese casseroles for sale in the United States, though often they’re of a larger size that might hold four portions at once. So that everyone can