Heat oil in skillet and add frozen burger patties. Heat until lightly browned.

Meanwhile, mix cornstarch, beef-style seasoning, onion powder and garlic powder with water. Pour into small saucepan and heat, stirring, until thickened.

Move burgers to the side of pan, add peppers and onions; cover and cook over low heat until tender. Cut burgers into strips and stir in gravy.