Season cube steak with garlic powder, paprika, salt, pepper, and Italian seasoning.
Heat oil or butter in a skillet and sear the cube steak on both sides.
Place the seared steak in the slow cooker.
Add sliced onion, minced garlic, beef broth, and dried thyme to the slow cooker.
Add any additional vegetables (carrots, potatoes, etc.) for a hearty meal.
Cook on low for 8-10 hours or high for 4-6 hours until tender.
For gravy, mix slow cooker juices, flour, and butter in a saucepan.
Whisk until smooth, bring to a boil, then simmer until thickened.
Serve the steak with the gravy over mashed potatoes, egg noodles, or your preferred side.