Skim excess fat from drippings in pan. Place 2 cups pan drippings in 1-quart saucepan (if necessary, add water to equal 2 cups). In tightly covered container, shake cold water and flour until smooth. With saucepan over medium-high heat, gradually stir flour mixture into drippings. Heat to boiling, stirring constantly. Boil and stir 1 minute. Serve gravy with beef and vegetables.