01 - Preheat outdoor grill or indoor grill pan to medium-high heat, approximately 375°F to 400°F.
02 - Place Cajun beef sausages on the preheated grill. Cook for 10 to 12 minutes, turning every 3 to 4 minutes to ensure even browning on all sides. Sausages should reach an internal temperature of 160°F. Transfer to a clean plate and let rest for 2 minutes.
03 - While sausages are grilling, place split baguettes cut-side down on the grill. Toast for 1 to 2 minutes until lightly crisp and golden brown. Watch carefully to prevent burning.
04 - In a small mixing bowl, combine mayonnaise, Dijon mustard, Creole mustard, ketchup, minced parsley, hot sauce, paprika, garlic powder, onion powder, and lemon juice. Whisk vigorously until completely smooth and well combined. Season with salt and pepper to taste.
05 - Spread a generous layer of remoulade sauce on both cut sides of each toasted baguette. On the bottom half, layer shredded lettuce, tomato slices, dill pickle slices, and red onion rings. Place a grilled Cajun sausage on top of the vegetables. Close with the top half of the baguette.
06 - Press sandwiches gently to compact ingredients slightly. Serve immediately while sausages are still warm and bread remains crisp.