Slow Cooker Cube Steaks with Gravy

1/3 cup all purpose flour
6 beef cube steaks (1-1 1/2 lbs)
1 tbsp vegetable oil
1 large onion, chopped
3 cups water/divided
1 envelope brown gravy mix
1 envelope mushroom gravy mix
1 envelope onion soup mix

Place flour in large ziplock baggie. Add steaks, a few at a time and dredge until well coated.

in skillet, cook steaks in oil until lightly browned on each side. Transfer to slow cooker. Add onion and 2 cups water. Cover and cook on low heat for 6-8 hours, until tender.

In bowl, whisk together the mixes with 1 cup water. Add to slow cooker, cook 30 minutes more.

Serve over mashed potatoes or egg noodles.