In a shallow container or bowl, mix together flour and garlic powder.

Sprinkle both sides of cubed steak with salt and pepper. Dip and cover both sides of the cubed steak in flour mixture.

Heat oil in a medium skillet over medium-high heat. Add the breaded cube steak and cook on both sides until crispy and golden browned, about 2 minutes each side.

In the bottom of 6 quart slow cooker, stir together to combine French onion soup, one can of water or beef broth, au jus gravy envelope mix, diced tomatoes with juice, and 2 shakes Worcestershire sauce.

Place prepared cube steak in crock pot with gravy mixture.

Cover crock pot with lid and cook on medium for 6-8 hours. Or until meat is tender.