Preheat your oven to 400°F and scrub the russet potato thoroughly under cold water.
Pierce the potato several times with a fork, rub the skin with half of the ghee and a pinch of sea salt, then bake for 45-60 minutes until the center is tender.
While the potato is roasting, poach or pan-sear the chicken breast until the internal temperature reaches 165°F, then shred it using two forks.
In a small mixing bowl, whisk together the buffalo hot sauce, the remaining ghee, and the garlic powder.
Toss the shredded chicken in the buffalo sauce mixture until every piece is evenly coated.
Finely dice the celery stalk and thinly slice the green onions for a fresh crunch.
Once the potato is finished, slice it down the center and fluff the interior with a fork, seasoning with the remaining salt and pepper.
Stuff the potato with the buffalo chicken mixture, then top with a dollop of Greek yogurt, diced celery, and green onions.