Butterfly chicken breasts horizontally to create uniform 1/2-inch thickness.
Prepare coating mixture: combine almond flour, grated Parmesan, Italian herbs, garlic powder, and xanthan gum in a shallow dish.
In a separate bowl, whisk together eggs and heavy cream to create an egg wash.
Dip each chicken breast into the egg wash, ensuring complete coverage.
Press chicken into the almond flour coating mixture, turning to coat all sides evenly.
Heat avocado oil in a cast iron skillet to exactly 350°F (measure with thermometer).
Shallow-fry chicken for 3-4 minutes per side until golden brown and internal temperature reaches 155°F.
Transfer chicken to a baking sheet lined with a wire rack.
Top each piece with 2 tbsp low-carb marinara and 1.5oz mozzarella cheese.
Broil for 2-3 minutes until cheese is bubbling and browned, and internal temperature reaches 165°F.
Rest for 5 minutes before serving to allow protein renaturation and moisture redistribution.