Preheat oven to 400 F.
In large bowl, toss cubed sweet potatoes with 1 tablespoon turmeric ghee, cumin powder and smoked paprika; add salt and pepper, to taste. Spread sweet potatoes evenly on baking sheet and roast 25-30 minutes, or until tender and slightly crispy on edges, turning halfway through.
Cook quinoa according to package instructions. Once cooked, fluff with fork and set aside.
In medium bowl, mix cooked quinoa with black beans, red onion and 1/4 cup chopped cilantro.
Drizzle half the lime juice over quinoa mixture and stir to combine. Add salt and pepper, to taste.
In large serving bowl, top quinoa mixture with roasted sweet potatoes. Drizzle remaining turmeric ghee over bowl. Squeeze remaining lime juice over top. Garnish with additional chopped cilantro and crumbled feta or goat cheese, if desired.