Warm the oven to 350F (180C)
Salt the snapper filets, and cover them with four thin slices of lemon. (Keep the other lemon half to juice later).
Baked covered in foil for about 20 minutes at 350 F. While the fish is baking:-
In a glass or cup, soak 1/2 cup of shredded bread in a little water for a couple of minutes while you blend the nuts.
Blend 1/2 cup of nuts and add to a bowl.
Squeeze out the water from the soaked bread and add it the blended nuts. Mix well.
Add the juice of the remaining half of the lemon and half a cup of water and mix well.
Using a hand blender, drizzle 1/2 cup of sunflower oil a little bit a time until you get the consistency of a thick mayonnaise.
Salt to taste.
When the fish is done, cover both filets with a thick coat of sauce and serve at room temperature.