Preheat your oven to 400°F and pierce the Russet potato several times with a fork.
Bake the potato directly on the oven rack for 45 to 50 minutes until the skin is slightly crisp and the inside is tender.
Remove the potato from the oven and let it cool enough to handle, then slice it in half lengthwise.
Scoop out most of the flesh, leaving about a 1/4-inch thick shell of potato against the skin.
Brush the inside and outside of the potato skins with olive oil and return them to the oven for 10 minutes to crisp up.
While the skins are crisping, brown the ground turkey in a non-stick skillet over medium heat with the diced onion and minced garlic.
Stir in the tomato puree, chili powder, cumin, sea salt, and black pepper, simmering for 5 minutes until the mixture has thickened into a hearty chili.
Remove the skins from the oven, spoon the turkey chili mixture into the shells, and sprinkle with the shredded cheddar cheese.
Bake for an additional 3 minutes until the cheese is melted and bubbly.
Top each potato skin with a generous dollop of Greek yogurt and a sprinkle of sliced green onions before serving.