Preheat your oven to 400°F (200°C). Scrub the Russet potato clean, prick it several times with a fork, and bake directly on the oven rack for 45 to 50 minutes until tender.
While the potato is baking, heat a non-stick skillet over medium heat. Add the ground turkey and cook until browned, breaking it up with a spatula.
Stir in the tomato paste, chili powder, cumin, garlic powder, sea salt, and black pepper. Add 2 tablespoons of water to create a thick sauce and simmer for 5 minutes.
Once the potato is cool enough to handle, slice it in half lengthwise. Use a spoon to scoop out the flesh, leaving about a 1/4-inch thick shell of potato against the skin.
Brush both the inside and outside of the potato skins with olive oil. Place them skin-side up on a baking sheet and bake for 7 minutes, then flip and bake for another 5 minutes until crispy.
Fill the hollowed crispy skins with the prepared turkey chili mixture and sprinkle the shredded cheddar cheese evenly over the top.
Return the loaded skins to the oven for 2 to 3 minutes, or until the cheese is melted and bubbly.
Serve immediately topped with a dollop of Greek yogurt and a sprinkle of sliced green onions.