01 - Preheat oven to 400°F and line a baking sheet with parchment paper.
02 - Pat shrimp dry and finely chop into small pieces. Place in a medium bowl.
03 - Add mayonnaise, Sriracha, Cajun seasoning, garlic, shallot, cilantro, fish sauce, lime juice, salt, and pepper to shrimp. Mix until well combined.
04 - Spread a thin layer of softened butter on each baguette slice and arrange on the prepared baking sheet.
05 - Spoon the shrimp mixture evenly onto each slice, gently pressing to adhere.
06 - Bake for 8-10 minutes until shrimp is cooked through and tops are golden.
07 - Remove from oven and let cool for 2 minutes. Garnish with green onions, sesame seeds, and extra cilantro. Serve with lime wedges.