Preheat your oven to 400°F (200°C).
Place the chicken breast between two sheets of parchment paper and pound to an even 1/2-inch thickness.
In a shallow dish, whisk the egg until well combined.
In a separate shallow dish, mix together the almond flour, parmesan cheese, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken breast into the egg wash, then press firmly into the almond flour mixture to coat both sides thoroughly.
Heat the olive oil in a medium oven-safe skillet over medium-high heat.
Sear the chicken for 3 minutes per side until the crust is golden brown and crispy.
Spoon the marinara sauce over the center of the chicken and top with the mozzarella cheese.
Transfer the skillet to the oven and bake for 10-12 minutes until the chicken is cooked through and the cheese is bubbly.
Garnish with fresh torn basil before serving.