Preheat oven to 350°F. Arrange opened Cooking Bag in 13x9-inch baking pan or dish. Place beef and vegetables in bag.
Stir Seasoning Mix, flour and water until smooth. Pour over beef and vegetables. Close bag loosely with nylon tie. Cut 4 small holes in top of bag to allow steam to escape.
Bake in lower half of oven 1 1/2 hours. Remove from oven. Let stand 5 minutes. Cut open bag. Stir before serving.