In a large heavy skillet set over moderately high
heat, heat the oil until it is hot, add the garlic and cook, stirring,
until it is pale golden. Add the red pepper flakes and the shrimp and cook
the mixture, stirring, for 1 minute, or until the shrimp are pink and just
firm to the touch. Sprinkle with shrimp with the paprika and cook the
mixture, stirring, for 30 seconds. Add the Sherry, boil the mixture for 30
seconds, and sprinkle with parsley. Season the mixture with the lemon
juice and salt and pepper, to taste, and transfer it to a serving bowl.
The shrimp may be made up to 1 day in advance and kept covered tightly
and chilled. Serve the shrimp at room temperature.