Real Deal Kung Pao Chicken Recipe

Name: Real Deal Kung Pao Chicken Recipe
Ingredients: 1 1/2 pounds boneless skinless chicken thighs, trimmed of excess fat, and cut into 1/2 to 3/4-inch pieces; 2 tablespoons soy sauce, divided; 2 tablespoons Shaoxing wine, divided (or dry sherry, if unavailable); 1 tablepoon cornstarch, divided; 1/3 cup peanut oil; 1 to 2 tablespoons Sichuan peppercorns toasted in hot skillet for 30 seconds until fragrant, divided; 3 scallions, whites finely minced, and greens finely sliced, reserved separately; 1/2 cup fried fresh peanuts or roasted unsalted peanuts; 2 cloves minced garlic (about 4 teaspoons); 1 tablespoon minced fresh ginger; 1 tablespoon Chinese black vinegar (or distilled white vinegar if unavailable); 1 tablespoon Sichuan fermented chili-bean paste (or generic Asian chili-garlic sauce if unavailable); 2 teaspoons sugar; 12 hot Chinese dry chili peppers, seeded; 2 small leeks, white and light green parts only, cut into 1/4-inch slices (about 1/2 cup total)