1.Combine The Rice And Water In A Saucepan Over Medium-High Heat. Bring To A Boil, Then Reduce Heat To Low, Cover, And Simmer For 20 Minutes, Or Until Rice Is Tender. In A Small Bowl, Stir Together The Soy Sauce, Peanut Butter, Vinegar, And Cayenne Pepper. Set Aside. 2.Heat Oil In A Skillet Or Wok Over High Heat. Add Chicken, Garlic And Ginger, And Cook, Stirring Constantly, Until Chicken Is Golden On The Outside, About 5 Minutes. 3.Reduce Heat To Medium, And Add Green Onion, Broccoli, Peanuts, And The Peanut Butter Mixture. Cook, Stirring Frequently, For 5 Minutes, Or Until Broccoli Is Tender, And Chicken Is Cooked Through. Serve Over Rice.