01 - Preheat grill to medium-high heat, approximately 375-400°F.
02 - Place Cajun beef sausages on the preheated grill. Cook for 10-12 minutes, turning every 3-4 minutes, until well browned and cooked through with an internal temperature of 160°F. Remove from grill and let rest for 2 minutes.
03 - While sausages are grilling, split the baguettes in half lengthwise. Place cut-side down on the grill for 1-2 minutes until lightly toasted and crisp.
04 - In a small mixing bowl, whisk together mayonnaise, Dijon mustard, Creole mustard, ketchup, minced parsley, hot sauce, paprika, garlic powder, onion powder, and lemon juice until smooth and well combined. 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 pickles, and red onion. Place a grilled sausage on top of the vegetables. Close with the top baguette half, press gently together.
06 - Cut sandwiches in half diagonally if desired and serve immediately while sausage is still hot and bread is crisp.