Fresh caught fish (whatever is you favorite), stuff inside with wild onion, garlic, and palmetto hearts, wrap in palmetto leaves, place on a bed of coals, cover with coals. Cover with a 3-4 in. layer of dirt, 45 min then dig it out .
We have used grape leaves or cabbage leaves. Think of any natural growing plants in your area (woven cattails would also work), read up on them and see if they are edible and there ya go.
Cattails are common here around lakes, and my cousin weaves the leaves like a mat, not pretty but close together. You are working to keep the stem inside.