General Tso's Chicken Recipe

Adapted from http://prettygirlfood.com/post/42241481089/general-tsos-chicken-ingredients-serves-4-1-4

General Tso's Chicken

Ingredients for 4:
1/4 cup chicken stock
1 tablespoon soy sauce
1 tablespoon rice wine vinegar
2 tablespoons hoisin sauce
2 teaspoon Sriracha sauce
2 teaspoons sesame oil
3 tablespoons sugar
1/3 cup + 2 teaspoons cornstarch, divided
1 pound boneless skinless chicken