Pound the cube steak lightly with a meat mallet to even the thickness
Season both sides with salt and pepper
Dredge the steak in flour, shaking off excess
Heat oil or butter in a skillet over medium-high heat
Sear the steak for 2 to 3 minutes per side until browned
Lower the heat and add sliced onions or a little broth if desired
Cover and simmer on low for 20 to 30 minutes
Avoid overcooking to keep the meat tender
Let the steak rest for a few minutes before serving