For an ultra crispy crust you can substitute finely crushed pork rinds for some or all of the almond flour, which will slightly lower the carbs and increase the crunch. Make sure to pat the cod fillets very dry before coating so the Parmesan mixture adheres and crisps instead of steaming. Leftovers keep in the refrigerator for up to 3 days and reheat best in a 350°F oven or air fryer until warmed through and re crisped. Serve with low carb sides like roasted asparagus, broccoli, a simple Caesar salad, or buttery cauliflower mash for a complete keto friendly meal.