Ingredients:

• 1 1/2 cups mayonnaise
• 1/3 cup heavy cream
• 1 teaspoon garlic powder
• 1 teaspoon Louisiana hot sauce or Tabasco
• 1 teaspoon sweet pickle relish
• 2 teaspoons Cajun seasoning, such as Slap Ya Mama Cajun seasoning
• 1 tablespoon sweet paprika
• 1/4 cup creole mustard, spicy brown mustard, or Dijon mustard
• 2 teaspoons horseradish
• 3 tablespoons green onions, thinly sliced
• 1/2 cup celery, minced
• 1/4 teaspoon cayenne pepper, plus more to taste
• For the catfish:
• Canola oil for frying, approximately 3 to 4 cups
• 3 pounds catfish fillets
• 2 cups yellow cornmeal
• 1 tablespoon cajun seasoning
• 1 teaspoon cayenne pepper
• 4 large eggs
• 1 teaspoon water
• To serve:
• 2 loaves French bread
• 3 cups iceburg lettuce, shredded
• 1 cup dill pickle rounds
• 3 medium beefsteak tomatoes, sliced
• 1 medium onion