Heat 1 Tablespoon oil in medium sized skillet over medium to medium high heat.
Cut chicken into bit sized cubes and add to skillet. Sprinkle with pepper and a dash of salt
Cook chicken until browned and no longer pink (about 10 minutes).
While chicken is cooking, in a small bowl or measuring cup, combine apple juice, soy sauce, water, brown sugar, ground ginger, garlic, and crushed red pepper. Stir until smooth.
In a small dish, mix cornstarch with a couple tablespoons of water. Add the cornstarch mixture into the sauce mixture, and stir.
Once chicken is cooked, add the sauce & frozen veggies (if using) to the skillet. Stir to coat the chicken and veggies. Turn heat down to low, and simmer for 5-10 minutes (until the sauce thickens up).
Serve over rice or wide egg noodles