Simple, quick, and satisfying, beef and tofu stew is a popular home dish in Japan. With an addition of komatsuna (Japanese spinach – you can substitute with regular spinach or other leafy greens), it makes a nutritiously balanced one-pot dish. I love using Tamari Soy Sauce for seasoning, as it gives a nice deep flavor, but you can also make it with regular soy sauce and it will still taste great. If you have any leftovers, I highly suggest you reheat it in a donabe (or a small pot), drizzle some whisked egg over it, then once the egg is at your desired consistency, pour the whole thing over the rice to make a beef and tofu rice bowl. Just so that I will have enough leftover the next day, I tend to make extra amounts of this dish.