Sweet potato pone?
Denser, richer and chewier than a sweet potato casserole.
They used to sell this at the Jazz Fest and maybe still do, I haven't been in years.
I used to try to duplicate afterwards but never succeeded. Grated sweet potatoes is the only thing I can tell you.
I don't have my grandmother's recipe in front of me, but you mix sugar and eggs and then add some sweet milk, a bit of bourbon, a little flour, and some spices (cinnamon, nutmeg, something else?). Fold in a couple *finely* grated sweet potatoes and put into a greased casserole. Pour melted butter over the top and bake until set (a good while, at least an hour, maybe two). I'm guessing that it freezes okay, but it definitely can be made a couple days ahead (likely better that way, too!).
Traditional in our family for Thanksgiving, and absolutely delicious. I'm not sure it's a New Orleans thing; my grandmother was from Mississippi, and her family from Virginia.
In an old Episcopal Churchwomen's cookbook from the Memphis area the portions are listed as 1 C. sugar, 1/4 tsp. salt, 1 stick butter, 1 egg, 1/4 tsp. cinnamon, freshly ground nutmeg, 2 C. raw, grated sweet potato, grated rind of 1 orange, juice of 1/2 orange. Melt butter, mix everything together and bake in a casserole 55 mins. at 325 F.