Step 1: Prepare the Steak - Mix the all-purpose flour, seasoned salt, and garlic powder in a mixing bowl. Dredge each piece of cubed steak in this flour mixture, ensuring they're well-coated.
Step 2: Sear the Steak - In a large skillet, heat the vegetable or olive oil over medium-high heat. Once hot, add the floured cubed steak and sear for about 3-4 minutes on each side, until browned.
Step 3: Layer in the Crock Pot - Transfer the seared cubed steak to your Crock Pot. Layer the sliced onion on top of the steak.
Step 4: Prepare the Gravy - In a mixing bowl, combine the cream of mushroom soup, water, brown gravy mix, and onion gravy mix. Pour this gravy mixture over the steak and onions in the Crock Pot.
Step 5: Cook Low and Slow - Cover the Crock Pot and set it to low. Let it cook for about 6-8 hours, or until the steak is tender.
Step 6: Serve and Garnish - Once done, stir the gravy. Serve the cubed steak and gravy over mashed potatoes or rice, and sprinkle with chopped parsley if desired.