Preheat your oven to 400°F and line a baking sheet with parchment paper.
Toss the diced sweet potatoes with half of the avocado oil and a pinch of sea salt, then spread them in a single layer on the baking sheet.
Roast the sweet potatoes for 20 minutes, flipping halfway through, until they are golden brown and crispy on the edges.
While the potatoes roast, heat the remaining avocado oil in a large skillet over medium-high heat and brown the ground turkey until fully cooked.
Add the diced yellow onion and minced garlic to the skillet, sautéing for 3-4 minutes until the onions are translucent and fragrant.
Stir in the chili powder, ground cumin, smoked paprika, sea salt, and black pepper, allowing the spices to toast for 60 seconds.
Pour in the tomato puree and black beans, reduce heat to low, and simmer for 10 minutes to allow the flavors to deepen.
Gently fold the crispy roasted sweet potatoes into the chili just before serving to preserve their texture.
Serve warm in a bowl topped with a dollop of plain Greek yogurt for a creamy finish.