Rinse the dried shiitake mushrooms and red dates well. Cover with boiling water and soak mushrooms for 15 – 20 minutes or until softened. Red dates are usually softened in 5 to 10 minutes. While the mushrooms and dates are soaking, prepare the rest of your ingredients.
Slice the chicken breast thinly and add to a bowl. Then, add soy sauce, Shaoxing wine (cooking sherry), white pepper, sesame oil , cornstarch and stir well to coat the chicken. Marinate for 15 - 20 minutes.
Squeeze the mushrooms to remove the excess water. Remove the stem and discard or use for other soup stock recipes. Slice the shitake mushrooms and set aside.
Cut the Chinese red dates (jujubes) in half. Remove the pit and chop into bite sized pieces. Set aside
Place oil in a wok or large frying pan. Over medium heat add the ginger and garlic and fry until aromatic. Add the marinated chicken to the pan and lay it out in a single layer so it gets bronzed and then stir the chicken to cook on both sides over medium-high heat.
Add the sliced shiitake mushrooms and water chestnuts and stir fry for a minute or two. If your pan looks dry, add another tablespoon of oil to the pan.
Make the simple sauce right in the pan. Add in soy sauce, oyster sauce, sesame oil, water or chicken broth to thin the sauce and white pepper to taste. Toss to coat.
Add in the chopped red dates and Chinese black vinegar (Chinkiang) and toss until the sauce coats evenly. Garnish with green onions, if desired, and serve hot with steamed rice. Enjoy!