Thaw the salmon fillet overnight, or at least let it thaw. Thaw the creamed spinach in a saucepan for 1-2 hours.
Thaw and warm the creamed spinach over low heat. Season with nutmeg.
Rinse the salmon fillet with cold water, pat dry and cut into bite-sized pieces.
Heat a little oil in a non-stick pan. Fry the salmon fillet in it. Salt and pepper. Add tomato paste and sweat a little. Deglaze with the cream. Season again with salt, pepper and paprika. Tie the sauce with the sauce tie.
Brush a suitable baking dish with a little oil. Layer in it as follows: spinach, lasagne plates, salmon sauce, lasagne plates, spinach, lasagne plates, salmon sauce.
Place the creme fraiche in blobs on the last layer of salmon sauce. Sprinkle with the cheese.
Bake in a preheated oven (175 ° C top / bottom heat) for 30 minutes.