Ingredients

• 1 teaspoon Sichuan peppercorns
• 1 1/2 pounds soft (not silken) tofu, cut into 1-inch cubes
• 2 tablespoons Chinese hot bean paste (also called chili bean sauce)*
• 1 tablespoon Chinese black-bean paste or sauce*
• 4 tablespoons oyster sauce
• 2 tablespoons Asian chili powder*
• 1 tablespoon cornstarch
• 1/4 cup peanut oil
• 4 ounces ground beef
• 1 (1/4-inch) piece fresh ginger, minced (about 1 teaspoon)
• 2 cloves garlic, minced
• 1 scallion (white and green parts), thinly sliced on diagonal
• 1/4 cup Shaohsing rice wine
• 1 medium leek (white and pale green parts only), washed, halved lengthwise, and cut into 1/2-inch slices (about 1/2 cup)
• 1/2 cup chicken stock or low-sodium chicken broth
• 1 tablespoon light soy sauce
• 1 tablespoon dark soy sauce
• 2 tablespoons fresh cilantro, chopped (optional)
• *Available at Asian markets and in the Asian section of some supermarkets

Instructions

1. In dry heavy skillet over moderate heat, toast peppercorns, stirring, until fragrant, 3 to 5 minutes. Transfer to bowl and let cool, then grind in spice grinder to fine powder. Set aside.
2. In large pot over moderately high heat, bring 4 cups water to boil. Add tofu, remove from heat, and let steep, uncovered, 5 minutes. Using slotted spoon, transfer tofu to medium bowl and set aside.
3. In small bowl, whisk together hot bean paste, black-bean paste, 2 tablespoons oyster sauce, and chili powder. Set aside.
4. In small bowl, whisk together cornstarch and 3 tablespoons water. Set aside.
5. In wok or heavy large sauté pan over moderate heat, heat oil until hot but not smoking. Add beef, ginger, garlic, and scallions and stir-fry until meat is browned, about 1 minute. Add rice wine and cook, stirring occasionally, until most of moisture evaporates, 1 to 2 minutes. Add hot bean paste mixture and cook, stirring occasionally, until mixture is incorporated and oil in pan turns red, about 1 minute.
6. Add tofu, leeks, stock, light and dark soy sauces, and remaining 2 tablespoons oyster sauce and bring to boil. Whisk cornstarch mixture to recombine, then add to pan and cook, stirring occasionally, until juices thicken slightly, about 1 minute.
7. Transfer to serving dish. Sprinkle with Sichuan peppercorn powder and cilantro, if using. Serve immediately.