Sauce:
1 ½ cups water
1/3 cup rice vinegar
¼ cup lemon juice
2 ½ tablespoons soy sauce
2 tablespoons orange juice
1 cup packed brown sugar
2 tablespoons chopped green onion
1 tablespoon grated orange zest
½ teaspoon minced fresh ginger root
½ teaspoon minced garlic
¼ teaspoon red pepper flakes
3 tablespoons cornstarch
2 tablespoons water
Chicken:
2 large chicken breasts, cubed
1 cup all-purpose flour
¼ teaspoon salt
¼ teaspoon pepper
3 tablespoons cooking oil
Combine all of the sauce ingredients, except the cornstarch slurry, in a sauce pan and bring to a boil. Remove from heat, and cool.
Place chicken in a bowl and pour in 1 cup sauce. Refrigerate for at least 2 hours.
Reserve the remaining sauce. Mix flour, salt, and pepper in another bowl. Remove chicken from the marinade and coat with the flour mixture. Heat the oil in a large skillet over medium heat.
Cook chicken in the hot skillet until browned on both sides. Remove to a paper towel-lined plate.
Pour reserved sauce into the skillet adding the cornstarch slurry and bring to a boil over medium-high heat.
Reduce heat to medium-low, add the chicken, and simmer. until thick.