Preheat your oven to 400°F and line a baking sheet with parchment paper.
Scrub the Russet potato thoroughly, pierce it several times with a fork, and bake for 45 to 50 minutes until the center is tender.
While the potato is baking, place a non-stick skillet over medium heat and add the ground turkey, breaking it apart with a spatula.
Cook the turkey until browned, then stir in the chili powder, ground cumin, garlic powder, sea salt, and black pepper.
Pour in the tomato puree and simmer the mixture for 5 to 7 minutes until the liquid has reduced and the chili is thick.
Once the potato is cooked and slightly cooled, slice it in half lengthwise and scoop out the flesh, leaving about a quarter-inch of potato against the skin.
Place the potato skins back on the baking sheet and bake for an additional 5 minutes to ensure the edges are crisp.
Divide the turkey chili mixture evenly between the two potato halves and top each with the shredded sharp cheddar cheese.
Switch the oven to broil and place the potato skins on the top rack for 2 to 3 minutes until the cheese is melted and bubbling.
Remove from the oven and garnish with freshly sliced green onions before serving warm.