Preheat your oven to 400°F and line a small 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 bakes, slice the chicken breast into thin strips and thinly slice the bell peppers and red onion.
Heat the olive oil in a non-stick skillet over medium-high heat.
Add the chicken strips to the skillet along with the cumin, chili powder, garlic powder, sea salt, and black pepper.
Sauté the chicken for about 5 minutes until it begins to brown, then add the sliced peppers and onions to the pan.
Continue cooking for another 5 to 7 minutes until the chicken is fully cooked through and the vegetables are tender-crisp.
Once the potato is finished, slice it down the center and gently fluff the inside with a fork.
Generously stuff the potato with the chicken and fajita vegetable mixture.
Top the stuffed potato with a dollop of Greek yogurt and a sprinkle of fresh cilantro before serving.