In A Small Bowl, Combine The First Five Ingredients Until Blended; Set Aside. In A Large Skillet, Brown Pork In Oil On All Sides. Stir In The Gravy Mixture, Mushrooms And Onion. Bring To A Boil. Reduce Heat; Cover And Simmer For 10-15 Minutes Or Until Meat Juices Run Clear And Vegetables Are Tender. Serve Over Rice.