stir-fried chicken with bok choy... 20 minutes

the goods:

1/4 cup low-sodium soy sauce
1 tablespoon rice vinegar
2 teaspoons light-brown sugar
2 boneless, skinless chicken breasts, sliced into thin strips
4 teaspoons cornstarch
2 tablespoons vegetable oil
2 garlic cloves, thinly sliced
2 teaspoons minced peeled fresh ginger
4 cups bok choy (from 1 head)
1 small red chile or jalapeno, seeded and sliced
cooked rice, for serving

In a small bowl, combine soy sauce, vinegar, brown sugar, and 3 tablespoons water. In a medium bowl, toss chicken with cornstarch until coated. In a large wok or skillet, heat oil, garlic, and ginger over medium-high until fragrant, about 1 minute. Add chicken in a single layer, pressing against pan to sear. Cook, stirring, until lightly browned and just cooked through, 6 to 8 minutes. Add bok choy and chile and cook, stirring, until bok choy slightly wilts, about 1 minute. Add soy sauce mixture and cook until sauce thickens slightly, 2 minutes. Serve over rice.