01 - Fill an 8-10 quart stockpot with 6 quarts of water. Add seafood boil seasoning, kosher salt, cayenne pepper, bay leaves, black peppercorns, hot sauce, quartered onions, halved garlic head, and halved lemons. Bring the mixture to a rolling boil over high heat, ensuring the spices and aromatics infuse the water.
02 - Once the broth reaches a rolling boil, add the halved red potatoes. Cook for 10 minutes until they begin to soften but still hold their shape.
03 - Add the sausage pieces and corn sections to the pot. Continue boiling for 7 minutes, allowing the sausage to cook through and the corn to become tender.
04 - Add the live crawfish to the pot. Cover and cook for 7-10 minutes, stirring occasionally to ensure even cooking. The crawfish are done when their shells turn bright red and the tails curl tightly.
05 - Turn off the heat and let all ingredients soak in the seasoned broth for 10-20 minutes. The longer soak time allows more spice absorption and deeper flavor penetration.
06 - Pour the contents into a large colander to drain the liquid. Remove and discard the lemons, garlic head, and bay leaves.
07 - Transfer the crawfish, potatoes, corn, and sausage to a large serving tray or newspaper-lined table. Drizzle with melted unsalted butter and sprinkle with chopped fresh parsley if desired. Serve immediately while hot.