Season the salmon fillets with salt and Creole seasoning; you know me, I used Creole seasoning in EVERYTHING. Feel free to switch it out with pepper. Place in the fridge while you cut the puff pastry.
Preheat the oven to 375℉/190℃.
Lightly flour a board or clean surface. Then, roll out your puff pastry into a desirable shape. It will vary depending on the size of the salmon. Measure and ensure that the pastry is long enough to go all the way around your salmon.
Place each salmon fillet in the center of the puff pastry, leaving about 2 inches around the edges.
Spoon the spinach mixture equally on the top of each salmon fillet, spreading it evenly and smoothing it out so that the spinach mixture stays in place and does not fall over the sides.
Fold the corners of the pastry up over the salmon and press to seal—place seam-side down onto a baking sheet.
Brush the top and sides of the pastry with egg wash, then slit the top of the wrapped salmon with a sharp knife to create vents for steam to release.
Place on a greased baking sheet lined with parchment paper seam-side down.
Bake for 20-30 minutes or until the pastry is golden. While the salmon is cooking, make the cream sauce.