Season the steak pieces generously with salt and pepper
Dip the steak in flour and shake off any excess
Heat the vegetable oil in a pan or skillet over medium-high heat. Cook the coated steaks and sear on both sides until browned. Place the browned steak in the crockpot
Using the same pan, cook the sliced onion, garlic, and bell peppers for 3-5 minutes, until the onions are translucent, the garlic is fragrant, and the peppers are slightly softened
Transfer the cooked vegetables to the crockpot
Combine the diced tomatoes, beef broth, Worcestershire sauce, oregano, basil, and paprika in a deep dish. Pour the mixture over the steak and vegetables in the crockpot
Cover and cook on high for 3-4 hours or low for 6-8 hours until the steak cuts are fork tender
Serve your crockpot Swiss steak with your side dish of choice!