Don't worry if the shrimp appear undercooked after being boiled for just 1 minute. They will finish "cooking" overnight in the tangy citrus marinade. Amazing Seafood Recipes
To devein shrimp, slit the curled side of the shrimp with scissors to expose the intestinal tract (the vein), which can be clear or black. Pull out the veins with the tip of a knife or your fingers.
For shrimp served as finger food, like in this recipe, it?s best to leave their tail shells on so guests can pick them up easily.