Preheat your oven to 400°F and line a baking sheet with parchment paper for easy cleanup.
Slice the chicken breast into thin, even cutlets and pat them completely dry with paper towels.
In a shallow bowl, whisk the egg until smooth; in a second bowl, combine the panko, parmesan, oregano, garlic powder, sea salt, and black pepper.
Dip each chicken cutlet into the egg wash, then press firmly into the breadcrumb mixture until evenly coated on both sides.
Place the coated chicken on the prepared baking sheet, drizzle with olive oil, and bake for 15-18 minutes until the crust is golden and the chicken is cooked through.
While the chicken is in the oven, use a spiralizer to turn the zucchini into noodles and lightly sauté them in a non-stick pan for 2-3 minutes until just tender.
Warm the marinara sauce in a small saucepan over low heat until simmering.
To serve, plate the zucchini noodles, top with the zesty marinara sauce, place the crispy chicken on top, and garnish with freshly torn basil.