Preheat your oven to 400°F and line a baking sheet with parchment paper.
Pat the chicken breast dry and rub with half of the olive oil, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken on the prepared baking sheet and bake for 20 to 25 minutes until the internal temperature reaches 165°F.
While the chicken cooks, use a spiralizer to turn the zucchini into long, thin noodles.
Heat the remaining olive oil in a large skillet over medium heat and sauté the zucchini noodles for 2 to 3 minutes until just tender but not mushy.
Warm the marinara sauce in a small saucepan over low heat until simmering.
Slice the rested chicken breast into thin strips.
Divide the zucchini noodles between plates, top with the warm marinara sauce, sliced chicken, and a sprinkle of parmesan cheese.