Crawfish au Gratin

Preheat oven to 450 degrees.

In a sauce pan, melt butter over medium heat. Whisk in the flour and stir continuously for 1 minute. Whisk in milk, very slowly. Bring mixture to a boil, then reduce heat to medium-low and simmer for 5 minutes. Mixture should be thickened at this point. Remove from heat and stir in Cajun seasoning and 1/2 cup Parmesan cheese. Add crawfish; stir well.

Grease a glass pie dish or pie tin, and pour mixture into it. Top with remaining cheese. Bake for 8 – 10 minutes, or until cheese begins to bubble.