Preheat oven to 400 degrees Fahrenheit (204 degrees Celsius).
On a large rimmed baking sheet, toss cubed sweet potatoes with 0.5 tablespoons of olive oil, salt, and pepper.
Roast sweet potatoes for 25 minutes or until fork-tender and slightly caramelized.
In a medium saucepan, combine quinoa and water/broth. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes or until liquid is absorbed.
While quinoa and potatoes cook, heat the remaining 0.5 tablespoons of olive oil in a large skillet over medium-high heat.
Add ground turkey to the skillet and cook until browned, breaking it into small crumbles.
Stir in chili powder, cumin, garlic powder, and smoked paprika. Season with salt and pepper.
Add black beans and chopped kale to the skillet. Cook for 3-4 minutes until kale is wilted and beans are heated through.
To assemble, divide cooked quinoa among four bowls.
Top each bowl with a portion of the turkey and bean mixture, roasted sweet potatoes, avocado slices, and pepitas.
Finish each bowl with a dollop of Greek yogurt as a high-protein sour cream substitute.