Steps
1. Heat olive oil in a pan over medium heat.
2. Add minced garlic and sliced onion; sauté until fragrant and translucent.
3. Stir in red bell pepper and cook for 3-4 minutes until slightly softened.
4. Add cooked black beans, ground cumin, chili powder, salt, and pepper.
5. Cook for another 5 minutes, stirring occasionally, allowing flavors to blend.
6. Squeeze lime juice over the stir-fry and garnish with fresh cilantro if desired.
7. Serve hot as a main dish.