Preheat the oven to 400 F. Line a baking pan or rack with parchment paper.
In a large bowl, whisk the egg and heavy cream together.
In another bowl, mix together the parmesan cheese, almond flour, and seasoning.
Working with one chicken breast at a time, dip it in the egg mixture, flip it to cover both sides with the egg mixture, then transfer it to the parmesan mixture.
Cover the chicken completely with the parmesan mixture, getting it in the folds.
Transfer the coated breast onto the baking pan or rack. Repeat with the remaining 3 chicken breasts.
Bake for 20 minutes, then take out of the oven.
Spread 3 tbsp of marinara on each piece, and add the cheese on top.
Bake for another 10-15 minutes until the cheese has melted and is a bit golden.
Enjoy on its own or with a side of steamed vegetables.