Creole Curried Shrimp and Mirliton Casserole

Chayote, a gourdlike, pale green, delectable fruit about the size and shape of a large, scraggly pear, is called mirliton in Louisiana, where, as in Florida, it flourishes and is much loved. Over the years in New Orleans and around Cajun country, I’ve eaten mirliton fried, stuffed with seafood, and incorporated into salads, but since the fruit itself is pretty bland, it makes lots of sense to combine it with other ingredients, as in this popular curried casserole served at brunches througho