Cut prawns along back of the shell, with scissors. Start just behind the head and cut to the tail (you can cut off the head if you like). Devein. Cut through prawn meat to lower shell.
The Butter, Enough for 2 pounds of Prawns
Melt butter in a small pan. Add fresh lemon juice, parsley and sea salt.
Heat grill to high heat (450 degrees). Place prawns directly over the heat, shell side down. Baste flesh with butter. Grill for 4-5 minutes, leaving the cover up.
Turn prawns over and continue grilling another 3-4 minutes or until prawns turn opaque. Baste with more butter and serve.
*I like to cook these with the grill lid open so that I can see any flame ups the butter may cause. Timing may vary depending on your grill and the temperature outside. Don’t flip the shell side down until the shells have turned pink. You’ll know the flesh side is done once it turns opaque.
*When the flesh side is down, I use my tongs to press against the back of the prawns causing the flesh side to touch the grates. This will give you some seared marks but not a necessary step.