01 - Preheat grill 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, until well browned on all sides and cooked through to an internal temperature of 160°F. Remove from grill and let rest for 2 minutes before serving.
03 - While sausages are grilling, split the baguettes open and place cut-side down on the grill. Lightly toast for 1 to 2 minutes until golden and crisp. Remove and set aside.
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 incorporated. Season with salt and pepper to taste.
05 - Spread a generous layer of remoulade on both cut sides of each toasted baguette. Layer bottom half with shredded lettuce, followed by tomato slices, dill pickle slices, and red onion. Place a grilled sausage on top of the vegetables.
06 - Place the top half of the baguette over the sausage. Press down gently to compact the sandwich. Serve immediately while sausage is still hot and bread is crisp.