Marinade: In a medium bowl combine orange juice, orange zest, soy sauce, sesame oil, and salt. Add chicken tenders and stir to coat. Allow to marinate for 25-30 minutes.
Sauce: In a small saucepan combine orange juice, orange zest, chicken broth, Splenda, honey, soy sauce, oil, garlic, and apple cider vinegar. Bring to a boil; lower heat to a simmer and cook until liquid is reduced by 1/4. Season with salt to taste. Stir the 2 teaspoons cornstarch with a small amount of cold water and add to the sauce. Bring back to a boil and cook for 1-2 minutes, or until thickened. Set aside, but keep warm.
In a large bowl or ziplock bag add the 1/2 cup of cornstarch. Drain the chicken and toss with the cornstarch, shaking off excess. In a large skillet heat 2 tablespoons vegetable oil over medium-high. Add chicken and cook until golden and meat is cooked through. Gently toss cooked chicken with the sauce and serve.