I know, this isn't exactly a recipe, and I certainly cannot claim credit for making this (well, unless you count pouring in the hot water). But our next-door neighbors had just come back from a family vacation to their hometown in Osaka, Japan, and they brought back a very interesting souvenir for us.
It was a very beautiful (as are all things Japanese) box containing 9 different shapes that looked a lot like cookies or cakes. Good thing we didn't eat them though, because they were in fact ready-made miso soup mixes! Apparently, each 'shape' represents a different flavor, but we've only tried the orange one on the left so far. The cookie-like thing is actually a giant inflatable tofu containing dried green onions and some kind of pink vegetable. There's also some seasoning packets inside. Overall, it was very convenient and tasty - just like the real thing! Mom told me to pack it away and take it with me to Philadelphia, where I probably won't have such easy access to fresh food.