01 - Toss the shrimp with 1 teaspoon of Creole seasoning in a bowl until evenly coated. Set aside while preparing the roux.
02 - Melt the butter in a large heavy-bottomed skillet or Dutch oven over medium heat. Gradually whisk in the flour, stirring constantly. Cook the roux until it reaches a deep golden brown color, approximately 8-10 minutes. Be careful not to burn.
03 - Add the chopped onion, celery, and green bell pepper to the roux. Cook, stirring frequently, until vegetables are softened, about 5 minutes.
04 - Stir in the minced garlic and cook for 1 minute until fragrant, being careful not to let it brown.
05 - Add the drained diced tomatoes, bay leaves, dried thyme, smoked paprika, remaining Creole seasoning, and cayenne pepper (if using). Mix thoroughly to combine all flavors.
06 - Slowly pour in the stock while stirring constantly to prevent lumps from forming. Bring the mixture to a gentle simmer, then cook uncovered for 10-15 minutes until the sauce has thickened slightly.
07 - Add the seasoned shrimp to the pot. Cook just until the shrimp turn pink and are opaque throughout, 3-4 minutes. Do not overcook. Season with salt and black pepper to taste.
08 - Remove from heat and discard the bay leaves. Ladle the étouffée over cooked white rice. Garnish with chopped green onions and fresh parsley. Serve with lemon wedges on the side.