Mongolian Chicken

Ingredients

• 1 tablespoon oyster sauce
• 1 tablespoon soy sauce
• 1/4 cup water
• 1/2 tablespoon sugar
• 1/4 teaspoon dark soy sauce
• 10 ounces chicken breasts, boneless, skinless, and cut into cubes
• 1/2 tablespoon Chinese rice wine or Shaoxing rice wine, optional
• 1 teaspoon sesame oil
• 1/2 tablespoon cornstarch
• 1 1/2 tablespoons cooking oil, divided
• 2 cloves garlic, minced
• 1 inch piece ginger, peeled and sliced
• 6 stalks scallions, cut into 2 inch strips
• white sesame, optional, for garnish