You are, no doubt, familiar with the so-called trinity of Louisiana cookery: onions, celery, and bell pepper. Susan Spicer of New Orleans, a self-described eggplant freak who cooks in an internationally inflected Creole style, has honed a new sort of trinity: eggplant, oysters, and tasso.
Here, tasso, an intensely flavored smoked pork of Cajun origin, serves as a seasoning, in the same way that a smoked pig trotter flavors a pot of greens. Although Spicer recommends that you serve scoops of this gratin as an appetizer, consider yourself warned: We have done the same. And no matter what we served to follow, it paled in comparison. Your guests might be happier with a large helping of this Creolized casserole and a salad.