1tablespooncornstarch(dissolved in 2 tablespoons water)
Cut your block of tofu into bite-sized cubes and set aside. In a medium bowl, combine the stock, soy sauce, dark soy sauce, wine, sesame oil, and sugar, and set aside.
Heat 2 tablespoons oil in a wok or skillet over medium heat, and add the garlic. Cook for a minute, being careful not to let the garlic burn. Add the broccoli, and crank up the heat to high, stir-frying the broccoli for a minute or to, just until it starts to turn a bright green color.
Add the tofu and your stock mixture, tossing everything together gently. Bring to a simmer, and stir in the cornstarch slurry. Allow to simmer for about 2 minutes, until the sauce has thickened. Serve over steamed rice!