In a large mixing bowl add both gravy packets and water then whisk until well combined and you see no clumps. Then set to the side. In another large mixing bowl, add the ground beef, finely diced onions, onion powder, garlic powder, Worcestershire sauce, salt and black pepper to taste. Fold the meat, mixing together the seasonings.
Form the meat into patties. (You should end up with around 5 nice size patties) In a large skillet over medium-high heat, add the olive oil, sliced onions and mushrooms. Occasionally stirring, allow the onions and mushrooms to cook for about 3-4 minutes to soften up then scoot them to one side of the skillet. Place the patties into the skillet and allow to sear for 4-5 minutes on each side or until internal temp reaches 165 degrees.
If there is excess grease in the skillet, drain it. Then with the skillet over medium heat, add the gravy mixture, stirring until it thickens to desired consistency. Serve and enjoy!