Preheat your oven to 400°F and thoroughly scrub the Russet potatoes before piercing them several times with a fork.
Place potatoes directly on the oven rack and bake for 45-50 minutes until the centers are tender and the skins are slightly wrinkled.
While potatoes bake, heat a non-stick skillet over medium-high heat and brown the ground turkey, breaking it into small crumbles as it cooks.
Stir in the tomato paste, chili powder, cumin, garlic powder, sea salt, and black pepper with a splash of water, simmering until the sauce is thick and flavorful.
Slice the baked potatoes in half lengthwise and carefully scoop out the flesh, leaving about a quarter-inch of potato attached to the skin.
Lightly brush the potato skins with olive oil and return them to the oven for 10 minutes to achieve a golden, crispy texture.
Spoon the turkey chili mixture into the hollowed skins, sprinkle with shredded sharp cheddar, and bake for another 5 minutes until the cheese is bubbly.
Finish each potato skin with a dollop of nonfat plain Greek yogurt and a sprinkle of fresh sliced green onions.