Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Scrub the Russet potato clean, pierce it several times with a fork, and bake for 45 minutes or microwave for 7-9 minutes until tender.
Once cool enough to handle, slice the potato in half lengthwise and scoop out the flesh, leaving a quarter-inch thick shell.
Brush the inside and outside of the potato skins with olive oil and a pinch of salt, then bake for 10 minutes until crispy and golden.
While the skins crisp, brown the ground turkey in a non-stick skillet over medium heat until no longer pink.
Add the tomato paste, water, chili powder, cumin, garlic powder, salt, and pepper to the turkey, simmering for 5 minutes until the sauce thickens.
Divide the turkey chili mixture evenly between the two potato skins and top each with the shredded sharp cheddar cheese.
Return the skins to the oven for 3-5 minutes until the cheese is melted and bubbling.
Garnish with a dollop of Greek yogurt and a sprinkle of sliced green onions before serving.