Rinse the quinoa under cold water.
In a saucepan, bring vegetable broth to a boil.
Add quinoa, reduce heat to low, cover, and simmer for 15 minutes.
Preheat the oven to 400°F (200°C).
Toss sweet potato cubes with olive oil, salt, and pepper.
Roast sweet potatoes for 20 minutes or until tender.
Fluff quinoa with a fork and season with lime juice, salt, and pepper.
In a bowl, layer quinoa, black beans, and roasted sweet potatoes.
Top with avocado slices and fresh cilantro.
Drizzle with olive oil before serving.