Steps
1. In a medium bowl, combine the cooked black beans, cooked quinoa, diced tomatoes, and corn.
2. Add the olive oil, cumin, chili powder, salt, and pepper. Mix well to combine all ingredients.
3. Warm the mixture in a skillet over medium heat for about 5 minutes, stirring occasionally.
4. Serve the warm bean-quinoa mixture in a bowl, topped with sliced avocado and fresh cilantro if desired.
5. Squeeze a lime wedge over the top before enjoying.