01 -
1 1/2 pounds shrimp, fresh and shell-on.
02 -
1 small onion, chopped fine (makes 1/2 cup).
03 -
1 pound butter, soft and spreadable.
04 -
Big handful of finely minced parsley.
05 -
2 lemons, zested and squeezed for juice.
06 -
A pinch of black pepper.
07 -
A pinch of celery seed.
08 -
2 tablespoons sea salt, plus a bit for boiling.
09 -
Big handful of fresh dill, chopped up.
10 -
1 tablespoon Worcestershire sauce.