01 - Prepare outdoor grill or indoor grill pan to medium-high heat, approximately 375-400°F.
02 - Place Cajun beef sausages on the heated grill. Cook for 10-12 minutes, turning every 3-4 minutes until evenly browned and internal temperature reaches 160°F. Transfer to a cutting board and let rest for 2 minutes.
03 - While sausages cook, place split baguettes cut-side down on the grill. Toast for 1-2 minutes until lightly crisped and golden brown.
04 - In a small mixing bowl, combine mayonnaise, Dijon mustard, Creole mustard, ketchup, parsley, hot sauce, paprika, garlic powder, onion powder, and lemon juice. Whisk vigorously until completely smooth and well incorporated. Season with salt and black pepper to taste.
05 - Spread a generous layer of remoulade on both cut sides of each toasted baguette. Layer bottom half with shredded lettuce, tomato slices, dill pickle slices, and red onion rings. Place a grilled sausage on top of the vegetables.
06 - Top with the remaining baguette halves. Press down gently to compact the sandwich slightly. Serve immediately while the sausage is still warm and the bread retains its crunch.