Step 1

Melt butter in large skillet over medium heat until butter begins to turn tan at the edges. Saute onion, celery, and green pepper in hot butter until softened, about 5 minutes. Add cajun seasoning and stir to combine.

Step 2

Sprinkle flour into vegetable mixture and saute until combined, 3 to 4 minutes. Stir in tomatoes; cook until tomato juices begin to brown on bottom of pan, about 3 minutes. Whisk chicken broth into vegetable mixture, stirring until smooth. Bring to a simmer and cook until slightly thickened and reduced to a gravy consistency, 3 to 5 minutes. Stir in Worcestershire sauce and hot sauce.

Step 3

Stir crawfish (or langostino) into etouffee sauce.  Season with salt to taste.

Step 4

Serve over rice and garnish with green onions.