Steps
1. Heat olive oil in a skillet over medium heat.
2. Add minced garlic and sliced onion; sauté until translucent.
3. Add red bell pepper and cook for 3-4 minutes until slightly tender.
4. Stir in cooked black beans, chili flakes, cumin, and soy sauce.
5. Cook for another 5 minutes, stirring occasionally, until beans are heated through and flavors meld.
6. Season with salt and pepper to taste.
7. Garnish with fresh cilantro if desired and serve hot.