01 - Fill a large stockpot (at least 12-quart) with 8 quarts water. Add Cajun seasoning, kosher salt, black peppercorns, bay leaves, paprika, hot sauce, and lemons. Squeeze lemon juice into the water, then add the lemon halves. Bring to a rolling boil over high heat.
02 - Once boiling, add potatoes, onions, and garlic to the pot. Boil for 10 minutes until potatoes begin to soften.
03 - Add corn pieces and Andouille sausage to the pot. Continue boiling for 10 minutes more to cook through and infuse flavors.
04 - Add live crawfish to the pot. Stir well to submerge, cover with lid, and cook for 5 to 7 minutes until crawfish shells turn bright red.
05 - Turn off heat and stir in butter. Allow crawfish to soak in the seasoned liquid for 10 to 15 minutes to absorb maximum flavor.
06 - Using a slotted spoon or strainer, transfer crawfish, potatoes, corn, sausage, onions, and garlic to large serving trays or onto a newspaper-lined table.
07 - Sprinkle generously with additional Cajun seasoning if desired. Serve immediately while hot.