01 -
In your 6-quart cooker, toss in the onion slices and mushrooms. Stack the cube steak on top of the veggies. If needed, layer them.
02 -
Stir the onion soup mix, cream of mushroom soup, minced garlic, water, black pepper, and seasoned salt in a bowl until there are no lumps.
03 -
Dump the soup mixture on top of the steaks in the crockpot. Cook with the lid on for 6 hours on high or 8 hours using the low setting.
04 -
About an hour before it's done, stir in the dissolved cornstarch. Let it cook on high for another 30 to 60 minutes until the gravy thickens up nicely.
05 -
Spoon it over some mashed potatoes, rice, or noodles, and serve while it's warm.