Steps
1. Toast the slice of whole grain bread until golden and crisp.
2. In a bowl, mash the avocado with lime juice, salt, and pepper until smooth.
3. In a separate small bowl, mix black beans with olive oil, chili powder, cumin, salt, and pepper.
4. Spread the mashed avocado evenly over the toasted bread.
5. Top with the spiced black beans.
6. Garnish with chopped cilantro and red pepper flakes if desired.
7. Serve immediately and enjoy your flavorful, protein-packed meal.