Preheat oven to 350° F. Sautauté onions, pepers and garlic in butter or olive oil. Add milk and soup; bring to medium boil. Add crawfish, bring to medium boil again then add corn starch.
Lower heat and cook for another 10 minutes or until thick. Grease pie shell w/butter and place pie shell in bottom of pan then add thickened mixture. Put on top shell and bake at 350° for 20 minutes.Servings: