1 sweet potato, peeled and cubed
2 (8 ounce) packages dry corn bread mix
1 (16 ounce) package ground spicy pork sausage
3 tablespoons butter
1 stalk celery, chopped
1 bunch green onions, chopped
1 large onion, chopped
1/4 bunch fresh parsley, chopped
2 (8 ounce) cans oysters, liquid reserved