Add the water, butter and salt to a casserole pan and heat at a low temperature.
When the butter is melted, add the flour, and cook for 10 minutes over low heat, stirring constantly.
Off the heat, add the eggs and stir as the mixture is cooling.
Cut the fish into small pieces and remove any bones.
Blend the fish in a blender, and then hand mix it into the dough mixture.
Place the dough on a floured work surface and flour your hands.
Once cool, take a portion of the dough with a spoon and and form small round sausages in a silicone mold tray.
Put the quenelles in the fridge for a 1/2 hour or so that they hold together well.
Remove the quenelles from the mold and place in a deep dish baking tray.
Preheat the oven at 360°F (180°C°)
In a bowl, mix the heavy cream with seafood butter sauce.
Cover the quenelles with the cream sauce, cheese and sprinkling of nutmeg.
Place in the oven for 35 minutes.
Serve warm.