Place the chicken breast between two sheets of parchment paper and pound to an even half-inch thickness.
In a shallow bowl, whisk the egg until smooth.
In a separate shallow bowl, combine the almond flour, dried oregano, garlic powder, sea salt, and black pepper.
Dip the chicken breast into the beaten egg, letting any excess drip off, then press firmly into the almond flour mixture to coat both sides.
Heat the avocado oil in a non-stick skillet over medium heat.
Place the chicken in the skillet and cook for 4-5 minutes per side until the crust is golden brown and the chicken is cooked through.
Spoon the marinara sauce over the chicken and top with the mozzarella and parmesan cheeses.
Cover the skillet with a lid for 1-2 minutes until the cheese is completely melted.
While the cheese melts, steam the broccoli florets in a small amount of water until tender-crisp.
Serve the crispy chicken parmesan immediately alongside the steamed broccoli.