Steps
1. Preheat oven to 375°F (190°C).
2. Cut the top off the bell pepper and remove seeds and membranes.
3. In a small pot, combine quinoa and water. Bring to a boil, then reduce heat, cover, and simmer for 15 minutes or until water is absorbed.
4. Heat olive oil in a pan over medium heat. Sauté onion and garlic until translucent.
5. In a bowl, mix cooked quinoa, black beans, diced tomatoes, sautéed onion and garlic, cumin, salt, and pepper.
6. Stuff the bell pepper with the quinoa mixture.
7. Place stuffed pepper in a baking dish. Cover with foil.
8. Bake for 25 minutes. Remove foil, sprinkle cheese on top if using, and bake uncovered for another 5 minutes until cheese melts and pepper is tender.
9. Garnish with fresh cilantro before serving.