01 - Fill a large stockpot with 4 gallons of water. Add Cajun seasoning, bay leaves, black peppercorns, paprika, salt, hot sauce, onions, garlic, and lemons (squeeze juice into the water, then add the halves). Bring to a rolling boil over high heat.
02 - Add potatoes to the boiling broth. Cook for 10 minutes until partially tender.
03 - Add smoked sausage and corn to the pot. Boil for 10 minutes more to continue building flavor.
04 - Add live crawfish to the pot. Stir well, cover, and boil for 5–7 minutes until crawfish are bright red and cooked through.
05 - Turn off heat and allow the crawfish and vegetables to soak in the seasoned broth for an additional 15–20 minutes for maximum flavor absorption.
06 - Using a slotted spoon, transfer crawfish, potatoes, sausage, and corn to a large serving platter or spread over newspaper on a table. Sprinkle with extra Cajun seasoning, chopped parsley, and serve with lemon wedges and melted butter if desired.