Sprinkle salt evenly on both sides of the cube steaks. Combine flour and pepper in a shallow dish; dredge steaks in the flour mixture.
Brown 2 steaks in 1 1/2 tbsp hot oil in a large nonstick skillet over medium high heat 3 minutes each side; drain on paper towels. Repeat with remaining steaks and oil. Drain drippings from skillet, reserving 1 tbsp oil in skillet.
Saute onion and bell pepper in hot drippings 7 minutes or until tender.
Add diced tomatoes and remaining 3 ingredients to skillet. Bring to a boil, and cook, stirring often, 5 minutes or until slightly thickened. Return the steaks to the skillet; cover and cook over low heat 55 to 60 minutes or until tender.