Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Using a mandoline or a very sharp knife, slice the russet potato into paper-thin rounds.
In a bowl, toss the potato slices with half of the olive oil and the sea salt until evenly coated.
Arrange the potato slices in a single layer on the prepared baking sheet, ensuring they do not overlap.
Bake for 15 to 20 minutes, flipping halfway through, until the chips are golden brown and crisp.
While the chips bake, season the chicken breast with the remaining olive oil, garlic powder, dried oregano, and black pepper.
Heat a grill pan or skillet over medium-high heat and cook the chicken for 6 to 7 minutes per side until the internal temperature reaches 165°F.
Slice the chicken and serve it immediately alongside the warm, crispy potato chips.