Add mushrooms and stir. Reduce heat to medium and let mushrooms cook for approximately 20 minutes, stirring as needed to keep mushrooms from burning. Add tamari and sake. Cook until mushrooms are firm in texture and liquids are reduced, about 5-10 minutes. Add rice a little at a time and gently mix until all the rice has been added.
Pickled Beets Can keep in refrigerator for a refreshing vegetable dish . . .
Slice into bite-sized strips and steam beets until tender. Thinly slice onions and add to beets. Mix rice vinegar and rice syrup in small bowl. Add to vegetables. Serve immediately, or refrigerate for up to a few days.