In your crock pot, whisk together the au jus mix, soups, and 1/2 cup water.

Place steaks in the crock pot, pressing down into the soup mixture, making sure the steaks are at least coated in the soup mixture. Cove and cook on low for 6-8 hours.

In a bowl, whisk the cornstarch and 3 Tbsp of water together. Pile steaks up in one side of the crock pot and whisk the cornstarch mixture into the other half of the crock pot. Once combined, spread steaks out evenly in the crock pot.

Cover and cook on high for 30 minutes or until gravy has thickened. Serve with hot mashed potatoes on the side. Serves 4-6.