Solen Marginatus - M.Polo receipt

Dear Friends
Solen marginatus (ital. Cannolicchi) are commonly sold in supermarket in 1 Kg packs and rather easy to cook (see the images):
a) put the Solens in salt water for at least four hours for allowing them to expel in the water the sand present in their digestive system;
b) estract the first Solen avoiding to move the water, gently open its bivalve shell without breaking it, lift the Solen foot, estract the dark digestive system under the foot, detach the foot and the head from the shell and place it in a bowl;
c) repeat the operation c) for each Solen;
d) wash accuratly each Solen under cold water for removing possible residual sand;
e) in a cooking pan put olive oil, garlich, pine nuts and let it cook until the garlich smells; 
f) add the Solens, season with raisins and pepper and let cook 4-5 minuts turning the Solens;
g) pour the Solens in a bowl and enjoy your Solens.
Comments from your sides are welcomed.

Salutations
Giancarlo
P.S.: if you still remark residual sand in eating, wash more carefully the Solens next time.