Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
Pierce the sweet potatoes several times with a fork and place them on the prepared baking sheet.
Roast sweet potatoes for 45 minutes or until tender when pierced with a knife.
While potatoes roast, heat olive oil in a large skillet over medium-high heat.
Add ground turkey to the skillet and cook until browned, breaking it into crumbles.
Stir in the black beans, cumin, smoked paprika, garlic powder, onion powder, salt, and pepper.
Sauté the mixture for 5 minutes to integrate flavors, then remove from heat.
Slice the roasted sweet potatoes lengthwise and gently fluff the insides with a fork.
Distribute the turkey and bean mixture evenly into the sweet potato cavities.
Top each boat with shredded cheddar cheese and return to the oven for 3 minutes until cheese is melted.
Garnish each boat with a dollop of Greek yogurt and fresh cilantro before serving.