"¼ cup soy sauce 1 teaspoon sesame oil 2 pounds duck breast, skin removed and reserved, cut into half inch slices 1 medium red onion, thinly sliced 6 green onions, sliced, green and white parts separated 4 cloves garlic, minced or grated 1 tablespoon ginger, grated ¼ cup chicken stock 1 teaspoon cornstarch 2 teaspoons oyster sauce 1 teaspoon chili sauce, optional 1 teaspoon sesame seeds for garnish green onion for garnish"