Stashcook | Stir-Fried Chicken and Bok Choy

Ingredients

• 2 tablespoons soy sauce
• 2 tablespoons rice wine vinegar
• 1 1/2 tablespoons sesame oil
• 2 teaspoons light brown sugar
• 3/4 pound boneless chicken thighs, cut into 1/2-inch strips
• 2 tablespoons finely chopped gingerroot
• 2 cloves garlic, finely chopped
• 3 tablespoons peanut or vegetable oil
• 1/2 pound bok choy (1 head), trimmed and thinly sliced
• 2 leeks (1/2 pound), halved lengthwise and thinly sliced
• Pinch chile flakes
• Salt, as needed
• Cooked rice, for serving