Preheat your oven to 400°F and lightly grease a baking sheet with the olive oil.
In a shallow bowl, whisk the egg white until it becomes slightly frothy.
In a separate shallow bowl, combine the panko breadcrumbs, grated parmesan, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken breast into the egg white, ensuring it is fully coated, then press it firmly into the breadcrumb mixture until evenly crusted.
Place the chicken on the prepared baking sheet and bake for 15-18 minutes, or until the exterior is golden and the chicken is cooked through.
Remove from the oven and spoon the marinara sauce over the center of the chicken, then sprinkle with the shredded mozzarella cheese.
Return the chicken to the oven for an additional 3-5 minutes until the cheese is melted and bubbly.
While the cheese melts, steam the broccoli florets until tender-crisp.
Serve the crispy chicken parmesan immediately alongside the steamed broccoli.