Preheat your oven to 400°F (200°C).
Place the chicken breast between two sheets of parchment paper and pound with a meat mallet until it reaches an even half-inch thickness.
In a shallow bowl, whisk the egg white until it becomes slightly frothy.
In a separate shallow dish, combine the almond flour, grated parmesan, sea salt, black pepper, garlic powder, and dried oregano to create the breading mixture.
Dip the chicken breast into the egg white, ensuring it is fully coated, then dredge it through the almond flour mixture, pressing firmly to adhere the crust to both sides.
Heat the extra virgin olive oil in a medium oven-safe skillet over medium-high heat until the oil is shimmering.
Add the chicken to the skillet and sear for 3-4 minutes per side until the crust is a deep golden brown and crispy.
Spread the marinara sauce evenly over the top of the chicken and sprinkle with the mozzarella cheese.
Transfer the skillet into the oven and bake for 5-8 minutes, or until the chicken is cooked through and the cheese is melted and bubbly.