Tofu is a great food. In summer prepare as hiyayakko to cool you down. But in winter, make yudofu to warm you up. Both hiyayakko and yudofu are so simple to prepare, Japanese eat them often. Hiyayakko recipe can be found here.
If you have donabe, it is the most suitable vessel to cook and present yudofu on the table. Even if you don’t have it, you can still make and enjoy this warm nutritional dish.