Preheat oven to 400 degrees and line a baking sheet with parchment paper, set aside.
Add almond flour, parmesan cheese, 1 teaspoon salt, pepper, garlic powder, and Italian seasoning to a shallow dish. Mix well to combine. Add egg to a separate dish and whisk well.
Coat chicken breasts in egg mixture, then almond flour mixture. Place on baking pan.
Bake for 10 minutes and remove from oven. Add broccoli. Drizzle olive oil and remaining ½ teaspoon salt over broccoli. Toss well to coat. Add marinara sauce and extra parmesan cheese to the tops of each chicken breast.
Return pan to oven for an additional 10 minutes until chicken is cooked through. Cooking time will vary depending on thickness of chicken.