Minced Chicken in Lettuce Cups

Ingredients

• 5 Chinese dried black mushrooms
• 1⁄2 lb. boneless, skinless chicken breast
• 1⁄2 lb. boneless, skinless chicken thighs
• 3 tbsp. peanut oil
• 1 tsp. minced peeled ginger
• 1 tbsp. shaoxing (Chinese rice wine)
• Freshly ground white pepper
• 1 oz. Virginia ham, minced
• 1 tbsp. oyster sauce
• 2 scallions, white part only, trimmed and minced
• 1⁄2 cup drained whole canned water chestnuts, finely chopped
• 6 iceberg or bibb lettuce leaves