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 lemon juice into the water before adding the lemon 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 cooking vegetables and heat through sausage.
04 - Add live crawfish to the pot. Stir well to distribute evenly, cover, and boil for 5–7 minutes until crawfish turn bright red and are cooked through.
05 - Turn off heat and allow the crawfish and vegetables to soak in the seasoned broth for an additional 15–20 minutes to absorb maximum flavor.
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.