1. Pour 3 1/4 gal. water into a 7 1/2-gal. heavy stockpot; add celery, lemon, onion, spice mix, and 1 1/2 cups red sauce. Bring to a boil; add potatoes. Boil 20 minutes or until potatoes can be pierced easily with a knife. Transfer potatoes to a large, clean cooler to keep warm. Add sausage to pot; boil 5 minutes. Add corn; boil 5 minutes. Transfer sausage and corn to cooler.
2. Add half of crawfish to stockpot; boil 8 to 10 minutes or until crawfish tails curl. Transfer crawfish to a large bowl; toss with desired amount of Tejano Red Sauce. Transfer to cooler. Repeat boiling procedure with remaining crawfish. Serve with corn, sausage, and potatoes.
*6 to 8 lb. unpeeled, large raw shrimp may be substituted. Boil 3 minutes or just until shrimp turn pink.
CRAWFISH CONNECTION: ORDER, CLEAN, BOIL Order direct from lacrawfish.com or cajungrocer.com, and figure on 2 lb. live crawfish per person. To purge crawfish of mud and debris, place them a 48-qt. cooler with a pourable spout. Add cold water and 2 cups salt. Gently stir crawfish; let stand 3 minutes. Open spout, tilt cooler, and rinse crawfish with a steady stream of cold water until water runs clear.