Easy - for beginners
A delicious alternative to take-out!
In a small bowl, stir together first six ingredients; set aside.
Place flour on a sheet of waxed paper; coat chicken, then shake off excess.
In a 10-in. skillet, heat 1 tablespoon oil over medium-high heat. Cook chicken in three batches until tender and lightly browned on all sides. Remove chicken and keep warm. Add remaining oil to skillet; cook and stir green onions and green pepper for 1 minute. Stir in orange juice mixture. Bring to a boil; reduce heat and simmer for 3 minutes. Add chicken and orange slices (if using); heat through. Serve over rice.