You can get dried stuff in little packets, but I hear it's dire. I ended up getting some for my mother (including freeze-dried blocks of tofu) when she was in hospital up here the other year, but in her situation she was desperate, and anything will taste good next to hospital food!

My local Japanese restaurant tends to serve miso soup with diced tofu and spring onion along with most of its meals. Since I'm not usually making it as a side dish, I put more in there.