01 - In a saucepan, combine water, rice, butter, and salt. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes. Remove from heat and allow to rest, covered, for 10 minutes. Fluff with a fork before serving.
02 - In a large skillet or Dutch oven, melt 4 tablespoons unsalted butter over medium heat. Add the chopped onion, green bell pepper, and celery. Sauté until the vegetables are softened, approximately 7 minutes.
03 - Stir in the minced garlic and cook for 1 minute until fragrant. Sprinkle 2 tablespoons all-purpose flour over the sautéed vegetables and cook, stirring constantly, for 3 to 4 minutes to form a blond roux.
04 - Gradually add 1½ cups seafood or chicken stock, stirring continuously to prevent lumps. Incorporate the drained diced tomatoes, Cajun seasoning, smoked paprika, dried thyme, and bay leaf. Bring the mixture to a gentle simmer.
05 - Reduce the heat to low and simmer, uncovered, for 15 minutes, stirring occasionally, until the sauce has visibly thickened.
06 - Introduce 1 pound crawfish tails to the simmering sauce and cook gently for 5 to 7 minutes, or until thoroughly heated. Remove and discard the bay leaf. Adjust seasoning with salt, black pepper, and hot sauce as desired.
07 - Stir in 2 tablespoons fresh chopped parsley and half of the sliced green onions.
08 - Spoon the prepared fluffy rice into individual bowls. Ladle the hot crawfish étouffée generously over the rice. Garnish with the remaining sliced green onions.