Cut the salmon into small cubes. Peel and chop the onion.
Mix the batter with the spinach, onion, fleur de sel, pepper and the eggs. Add the salmon cubes and mix. Put the finished mixture in the baking tray. Place a spacer (e.g. wooden spoon) on the outside between the baking tray and the upper grill plate. Bake in the Optigrill baking tray on Manual Orange for about 80 minutes (check the baking progress regularly).