Step 1

Cut the lemon in half and add it to a large pot of boiling salted water. Add the shrimp and cook, uncovered, for only 3 minutes, until the shrimp are just cooked through. Remove with a slotted spoon to a bowl of cool water. When the shrimp are cool enough to handle, peel and devein them. Keep cold until ready to serve.

Step 2

For the cocktail sauce, combine the chili sauce, ketchup, horseradish, lemon juice, Worcestershire sauce, and hot sauce. Serve with the shrimp.