Ingredients
1/2 cup concentrated Louisiana-style shrimp and crab boil seasoning (such as Zatarain's)
4 pounds medium red potatoes
2 to 3 medium sweet onions, such as Vidalia, peeled and quartered if large
2 1/2 pounds cured, smoked pork sausage links, cut into 3-inch pieces
8 ears of corn, cut in half
4 pounds medium shrimp