Preheat your oven to 400°F and line two large baking sheets with parchment paper.
Slice the sweet potato into very thin, uniform rounds using a mandoline or a sharp chef's knife.
Toss the sweet potato slices in a bowl with half of the olive oil and a pinch of sea salt.
Arrange the sweet potato slices in a single layer on one of the prepared baking sheets, ensuring they do not overlap.
Rub the chicken breast with the remaining olive oil, sea salt, black pepper, dried oregano, and garlic powder.
Place the chicken on the second baking sheet and put both trays into the oven.
Bake the sweet potato chips for 20 to 25 minutes, flipping halfway through, until the edges are golden and crisp.
Bake the chicken for 18 to 22 minutes until the internal temperature reaches 165°F, then slice and serve with the chips.