Firm tofu seared until the edges are golden and slightly crisp, then simmered with garlic, ginger, and shiitake in a soy-and-Shaoxing braise. The sauce is thickened until it clings — spoon the whole thing over a bowl of hot rice.
Use firm tofu (老豆腐), not silken and not extra-firm. Silken falls apart in the wok; extra-firm refuses to soak up the braise. The texture you want is one that holds its shape under a spatula but still gives slightly when you press the surface.
The cornstarch dust is optional but it's the difference between a soft golden crust and a sturdy, lacquered one. If you're skipping it, fry a minute longer per side and don't move the pieces until they release cleanly from the pan.
For a vegetarian version, swap the oyster sauce for vegetarian mushroom "oyster" sauce — the shiitake soaking liquid is already doing the heavy lifting on umami. A handful of bok choy or napa added in the final braise turns this into a one-pan meal.