2 tablespoon soy sauce 1 teaspoon cornstarch 1 teaspoon sugar ½ teaspoon toasted sesame oil ¼ teaspoon ground black pepper 2 tablespoon butter 1 teaspoon grated fresh ginger 1 clove garlic, minced 3 cup finely shredded baby bok choy or Chinese cabbage 1 cup chopped fresh shiitake mushrooms ¾ cup shredded carrot ½ cup thinly sliced green onion 8 ounce chopped lean boneless pork