These adorable little cubes of steamed tofu are my riff on a traditional Hakka Chinese dish, where they are traditionally stuffed with pork and salt-cured fish. I can never really get into salt-cured fish, so I've substituted foraged mushrooms.
Hakka cuisine isn't well represented in the US, but the Hakka people are one of the important ethnic groups in China. They also have an international presence, primarily in Taiwan and Hong Kong, and some of their food has melded into those cultures. So when you have Taiwanese cuisine in the US, it may have Hakka origins or influences.
This dish can be made with nearly any wild, foraged mushroom, but for preference, I'd use hen of the woods, any of the Agaricus, wine-caps, or dryad's saddle.