Preheat your oven to 400°F. Scrub the Russet potato thoroughly and pierce the skin several times with a fork.
Place the potato directly on the oven rack and bake for 45-50 minutes, or until the skin is slightly crisp and the inside is tender.
While the potato bakes, heat a non-stick skillet over medium heat and add the ground turkey, breaking it apart with a spatula until browned and cooked through.
Stir in the black beans, tomato paste, chili powder, cumin, garlic powder, sea salt, and black pepper. Add a tablespoon of water if the mixture is too dry, then simmer for 5 minutes.
Once the potato is finished, remove it from the oven and let it cool for 5 minutes. Slice it in half lengthwise.
Scoop out the majority of the potato flesh, leaving about a 1/4-inch thick shell. Lightly brush the inside and outside of the skins with olive oil.
Place the skins cut-side down on a baking sheet and roast for 5-7 minutes. Flip them over and roast for another 3 minutes until the edges are golden.
Fill the crispy shells with the turkey chili mixture and sprinkle the shredded cheddar cheese evenly over the top.
Return to the oven for 2-3 minutes until the cheese is melted and bubbly.
Garnish each potato skin with a dollop of Greek yogurt and a sprinkle of sliced green onions before serving.