01 -
1 1/2 pounds of shrimp, shells on.
02 -
1 small onion, chopped into tiny bits (fills 1/2 cup).
03 -
Two lemons, squeezed for juice and grated for zest.
04 -
A spoonful of Worcestershire sauce.
05 -
A handful of parsley, finely chopped.
06 -
A pinch of celery seeds.
07 -
A pound of soft, unsalted butter.
08 -
A handful of dill, minced small.
09 -
A couple spoons of sea salt, plus more for cooking.
10 -
A little sprinkle of black pepper.