1. Preheat oven to 325 degrees F.

2. Heat oil up in a cast iron or other heavy bottomed pan over medium-high until oil is shimmering.

3. While oil heats combine flour, salt, pepper, celery salt, garlic powder, onion salt, and dry mustard in a large flat bowl. Take tenderized steak and dredge both sides in the flour mixture, shake off any excess.

4. Once oil is heated, carefully lay the steaks one at a time and fry until meat is browned and crisp. Remove from the pan and place in a baking dish that has a fitting cover.

5. Top steak with sliced onion, garlic, water, and Worcestershire sauce. Cover and place in preheated oven for 2 to 2 ½ hours, until steak is tender. Remove the steaks and transfer to your serving dish.

6. Transfer liquids to a small pot and let simmer until slightly thickened. Add sour cream and mix. Pour over the steaks and serve.