Butterfly the chicken breast by slicing it horizontally almost all the way through, then open it like a book to ensure even thickness.
In a shallow bowl, whisk together the almond flour, parmesan cheese, dried oregano, garlic powder, sea salt, and black pepper.
Press both sides of the chicken breast firmly into the almond flour mixture until it is thoroughly and evenly coated.
Heat the olive oil in a non-stick skillet over medium-high heat and sear the chicken for 4 to 5 minutes per side until the crust is golden brown and the meat is cooked through.
Spoon the marinara sauce over the chicken and top with the mozzarella cheese; cover the skillet with a lid for 1 to 2 minutes until the cheese is bubbly and melted.
Remove the chicken from the pan, then briefly toss the zucchini noodles in the remaining pan juices for 60 seconds until just tender.
Plate the zucchini noodles, place the chicken on top, and garnish with thinly sliced fresh basil before serving.