Cook Rice According To Package Directions; Set Aside. Drain Pineapple; Reserve Pineapple Chunks And Juice. In A Large Skillet, Saute Vegetables In Oil Until Crisp-Tender. Add Sausage And Pineapple Chunks; Cook And Stir Until Heated Through. In A Small Bowl, Combine The Cornstarch, Water, Soy Sauce, Brown Sugar And Reserved Pineapple Juice. Stir Into Sausage Mixture. Bring To A Boil. Cook And Stir For 1 Minute Or Until Sauce Is Thickened. Serve Over Rice.