Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Wash the potato and slice it into even wedges, then pat them completely dry with a paper towel to ensure they get crispy.
In a large mixing bowl, toss the potato wedges with olive oil, garlic powder, sea salt, and black pepper until every wedge is well coated.
Spread the wedges in a single layer on the prepared baking sheet and roast for 25-30 minutes, flipping halfway through, until golden brown.
While the potatoes roast, season the chicken breast with a pinch of salt and pepper and grill over medium-high heat for 6-7 minutes per side until the internal temperature reaches 165°F.
Remove the potatoes from the oven and immediately toss them with the grated parmesan cheese and dried parsley while they are still hot.
Slice the grilled chicken and serve it alongside the crispy wedges for a balanced, clean-eating meal.