Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel and cube the sweet potatoes into 1/2-inch pieces, and dice the chicken breast into bite-sized chunks.
In a large bowl, toss the sweet potatoes and chicken with olive oil, garlic powder, smoked paprika, sea salt, and black pepper until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 20-25 minutes, or until the chicken is cooked through and the potatoes are tender and golden.
While the chicken and potatoes roast, rinse and drain the black beans, then warm them in a small saucepan over low heat.
Place 1 cup of fresh spinach into each of the two serving bowls.
Divide the roasted chicken, sweet potatoes, and warm black beans evenly between the bowls.
Top each bowl with 2 tablespoons of Greek yogurt and a drizzle of fresh lime juice before serving.