Place a large skillet over medium high heat. 

In a large mixing bowl combine the ground beef, spices and grated onion and mix with your hands until completely blended.

Form the meat into 5 hamburger steak patties, about 1 1/2" thick.  Add the hamburger steak patties to the skillet and cook until browned, roughly 4 minutes and flip and repeat.

Remove the hamburger steak patties and place on a plate.  In a bowl, combine the gravy ingredients and whisk until blended. 

Pour the mixture into the skillet and use a spoon to scrape the drippings into the gravy.  Whisk with a fork until smooth and then add in the mushrooms and cook for 2 minutes.

Add the hamburger steak patties back into the gravy and warm for 5 minutes and then serve.