1. Heat olive oil in a large pot over medium heat. Brown the beef cubes in batches and set aside.
2. In the same pot, sauté onion and garlic until fragrant, about 2–3 minutes.
3. Add bell peppers and cook for another 5 minutes until slightly softened.
4. Return beef to the pot, stir in diced tomatoes, beef broth, smoked paprika, and cumin. Season with salt and pepper.
5. Bring to a boil, reduce heat, and simmer for 45 minutes. Add potatoes and cook for another 20 minutes until tender.
6. Serve hot with crusty bread or over rice.