Ingredients

  • 2 packages (14 ounces each) firm tofu, each sliced crosswise into 6 rectangles
  • 3 tablespoons finely grated peeled fresh ginger
  • 1/4 cup soy sauce
  • 1 tablespoon rice vinegar (unseasoned)
  • 1 tablespoon sugar
  • 2 teaspoons cornstarch
  • 1 to 1 1/2 cups water
  • 2 tablespoons vegetable oil, such as safflower
  • 8 ounces fresh shiitake mushrooms, stems removed, caps sliced 1/4 inch thick (about 4 cups)
  • 1 to 2 bunches watercress, tough stems removed (about 6 cups sprigs), for serving

Method

  • Press tofu: Arrange tofu slices in a single layer on a baking sheet lined with a double layer of paper towels.
  • Cover with more paper towels and another baking sheet; weight with a heavy skillet.
  • Let drain 15 minutes.
  • Meanwhile, make sauce: Place ginger in a fine sieve; press to release juices into a bowl (discard solids).
  • Whisk in soy sauce, vinegar, sugar, cornstarch, and 1 cup water.
  • In a large skillet, heat 1 tablespoon oil over medium.
  • Cook half the tofu until golden brown, 4 to 6 minutes per side.
  • Transfer to a plate.
  • Repeat with remaining tofu slices.
  • Heat remaining tablespoon oil in same skillet over medium.
  • Cook mushrooms, stirring often, until browned, about 5 minutes.
  • Add sauce; bring to a boil.
  • Cook just until thick enough to coat the back of a spoon, about 1 minute (if necessary, thin sauce with up to 1/2 cup more water).
  • Return tofu to pan; toss gently to coat.
  • Serve immediately, with watercress.
  • Before cooking tofu, its a good idea to squeeze out as much water as possible, which makes it easier for the tofu to absorb any marinade or sauce, hold its shape when cooked, and develop a golden crust when sauteed.