Place the chicken breast between two sheets of parchment paper and pound with a meat mallet to 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, parmesan cheese, garlic powder, dried oregano, sea salt, and black pepper.
Dip the chicken breast into the egg white, then dredge it in the almond flour mixture, pressing firmly to ensure an even coating on both sides.
Heat the olive oil in a non-stick skillet over medium heat.
Carefully place the chicken in the skillet and cook for 5-6 minutes per side until the crust is golden brown and the internal temperature reaches 165 degrees Fahrenheit.
Spoon the marinara sauce over the center of the chicken and sprinkle with the shredded mozzarella cheese.
Cover the pan with a lid for 1-2 minutes until the cheese is completely melted and bubbly.
While the chicken finishes, steam the broccoli florets in a steamer basket for 4-5 minutes until tender-crisp and serve immediately alongside the chicken.