I like them "cedar planked". You can get cooking grade cedar planks at places like Sur le Tabl or Williams Sanoma.
Season the Spanish Mackerel filets. Place them on the cedar planks. Set the planks out in the sun for about 5-6 hours. Take the filets off. Then cook and eat the planks any way you want.
Run a stainless rod through them, Pull your leader back through with the rod, Attach a 16/0 or 20/0 hook to leader depending on the size of the Mac, Add 1/2 to 1lb. of lead with prongs depending on size of Mac, Tie this assembly to a nice 6/0+ reel, Paddle assembly to a deep cut or just past the third sandbar, Allow to soak as long as needed...
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"The Government can't give you anything, they haven't taken from you first."