Place broccoli in a steamer over 1 inch of boiling water, and cover. Cook until tender but still firm, about 2 to 6 minutes.
Drain, cool and set aside.
Heat butter in a large skillet over medium high heat.
Saute chicken in butter until browned.
Remove from skillet and set aside.
Saute mushrooms in skillet for 1 minute; remove from skillet and set aside. Stir in flour, water, orange juice concentrate and seasoning.
Heat to boiling, stirring. Simmer, stirring, for 4 minutes. Return chicken and mushrooms to skillet; stir in orange segments, green onion and broccoli.