Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Season the salmon fillets with salt and pepper.
In a mixing bowl, combine almond flour, coconut flour, melted butter, garlic powder, and lemon zest to form the dough.
Between two pieces of parchment paper, roll the dough into a rectangle, about 1/4 inch thick.
Remove the top parchment paper and spread the cream cheese evenly over the dough, leaving a small border around the edges.
Sprinkle the chopped spinach and dill over the cream cheese.
Place the salmon fillets on top of the spinach and cream cheese layer.
Fold the dough over the salmon, pressing the edges to seal, and trim any excess dough.
Brush the top of the dough with the beaten egg for a golden finish.
Carefully transfer the wrapped salmon to the prepared baking sheet.
Bake in the preheated oven for about 20 minutes, or until the crust is golden and the salmon is cooked through.
Let it rest for 5 minutes before serving.