Instructions:

1. Cook the Potatoes: In a large skillet, heat 1 tablespoon of olive oil over medium heat. Add the cubed potatoes and cook until golden and tender, about 10 minutes. Remove from the skillet and set aside.
2. Cook the Ground Beef: In the same skillet, add the remaining olive oil and the ground beef. Cook until browned, breaking it apart as it cooks. Add the diced onion and garlic, and cook for an additional 2-3 minutes.
3. Add Spices and Tomatoes: Stir in the cumin, paprika, cayenne pepper (if using), and a pinch of salt and pepper. Pour in the diced tomatoes and their juices, and simmer for 5 minutes.
4. Add Green Beans and Potatoes: Add the green beans to the skillet, stirring to combine. Cook for 10-12 minutes, until the beans are tender. Stir the cooked potatoes back into the skillet, and heat through for another 2-3 minutes.
5. Serve: Serve warm as a complete dish.

Enjoy!