Lobster Cantonese

Name: Lobster Cantonese
Ingredients: 1 tablespoon cornstarch; 3/4 cup reduced-sodium chicken broth; 1/4 cup Chinese rice wine or dry Sherry; 3 tablespoons soy sauce; 1 teaspoon sugar; 1/4 teaspoon black pepper; 2 (1 1/2-lb) live lobsters; 2 tablespoons vegetable oil; 2 tablespoons Chinese fermented black beans, rinsed and finely chopped; 2 teaspoons finely chopped garlic; 2 teaspoons finely chopped peeled fresh ginger; 4 scallions, trimmed and cut into 1 1/2-inch pieces; 1/4 lb ground fatty pork; 2 large eggs, lightly beaten; 2 teaspoons Asian sesame oil; kitchen shears; a well-seasoned 14-inch flat-bottomed wok with a lid