Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Peel and cube the sweet potato into half-inch bite-sized pieces.
Toss the sweet potato cubes on the baking sheet with olive oil, sea salt, and black pepper until evenly coated.
Roast the potatoes for 20-25 minutes, flipping halfway through, until they are golden and fork-tender.
While the potatoes roast, heat a non-stick skillet over medium heat and add the ground turkey, garlic powder, and smoked paprika.
Cook the turkey until browned and cooked through, then stir in the diced bell peppers for the last 3 minutes of cooking.
In a small bowl, whisk the Greek yogurt with a teaspoon of water to achieve a smooth, drizzling consistency.
Divide the roasted sweet potatoes and turkey mixture into bowls, then finish with a generous drizzle of the yogurt sauce and a sprinkle of fresh green onions.