Remove backbone from the salted anchovies
soak the anchovies to remove excess salt
melt butter in pan with spices
in a blender add the anchovies and spice butter and blend
Add the rusk to the anchovie mix. A quick blend, but not too much
Leave the mixture overnight to allow the rusk to soak up the juices
reblend the mixture and then put into pots or jars. The mix tastes better after a few days