For the marinade and sauce:
For the coating and frying:
To make the marinade and sauce, combine the chicken broth, orange juice, orange zest, vinegar, soy sauce, brown sugar, garlic, ginger and cayenne pepper in a large bowl. Whisk to blend well. Measure out 1/2 cup of the mixture and transfer it to a large zipper lock plastic bag. Add the chicken pieces to the bag, pressing out the excess air and sealing well. Refrigerate and let marinate 30-60 minutes, but no longer.
Place the remaining mixture into a saucepan with the remaining mixture on the stove. Leave alone for now.
To prepare the coating, place the egg whites in a pie plate and whisk until frothy. In a second pie plate combine the cornstarch, baking soda and cayenne pepper; whisk to blend. Drain the chicken of the marinade in a colander or large strainer; pat dry with paper towels. Place half of the chicken pieces in the egg whites and turn to coat. Transfer the pieces to the cornstarch mixture and coat thoroughly, shaking off the excess. Transfer to a plate and repeat with the remaining chicken pieces.
To fry the chicken, heat the oil in a 11- or 12-inch round Dutch oven or straight-sided sauté pan until the oil reaches 350˚ F. Carefully place half of the chicken pieces in the oil and fry until golden brown, about 4 minutes, turning the pieces halfway through cooking. Remove from the oil with a skimmer or slotted spoon and transfer to a paper towel-lined plate. Return the oil to 350˚ F and repeat with the remaining chicken pieces.
While chicken is cooking heat the remaining sauce mixture over medium-high heat. Bring to a simmer. In a small bowl, whisk together the cornstarch and water until smooth. Add the mixture to the saucepan with the sauce. Continue simmering until the sauce is thick and translucent, about 1 minute. Remove from the heat and stir in the strips of orange peel, if using.
Toss sauce with the cooked chicken pieces. Serve over rice, if desired.
by The Savvy Kitchen