Pat steaks dry with a paper towel. Season with salt, pepper, and smoked paprika.
Put flour in a shallow dish and dredge each steak.
Heat oil in a large skillet over medium-high heat and brown steaks on both sides, about 2 minutes per side, adding more oil if needed.
Place carrots, bell pepper, onion, and garlic into the Crockpot.
Layer the seared cube steaks on top.
In a bowl, combine beef broth, diced tomatoes with liquid, brown gravy mix, tomato paste, and Worcestershire sauce. Pour into the Crockpot over the beef and vegetables.
Cover and cook 6–8 hours on LOW or 4–5 hours on HIGH, until steaks are fork tender.
Top with chopped parsley. Serve over mashed potatoes or noodles.