Prep the chicken: If your chicken breasts are thick, slice them horizontally into cutlets or pound to about 1/2-inch even thickness. Pat dry with paper towels.
Season lightly with 1/2 teaspoon salt and the black pepper.
Set up the coating station: In one shallow bowl, whisk the eggs. In another, mix almond flour, 1/2 cup grated Parmesan, garlic powder, Italian seasoning, and remaining 1/2 teaspoon salt.
Coat the chicken: Dip each cutlet in egg, shake off excess, then press into the almond-Parmesan mixture. Coat both sides well and set on a plate.
Preheat the oven: Heat to 400°F (200°C).
Lightly oil a 9x13-inch baking dish and spread 1/2 cup marinara over the bottom.
Sear for texture: Heat olive oil in a large skillet over medium-high. Sear cutlets 2–3 minutes per side until golden. They don’t need to cook through; you’re building crust and flavor.
Assemble the bake: Arrange seared chicken over the marinara in the baking dish.
Spoon remaining marinara over the top, then sprinkle with mozzarella and the extra Parmesan.
Bake: Bake uncovered for 15–20 minutes, until the cheese is melted and bubbling and the chicken reaches an internal temperature of 165°F (74°C).
Rest and garnish: Let the dish rest 5 minutes. Top with chopped basil or parsley. Add red pepper flakes if you like heat.
Serve: Pair with a simple green salad, steamed broccoli, or roasted veggies.
If you want carbs, serve with whole-wheat pasta or spaghetti squash.