For the Rockefeller sauce: Melt the butter in a large skillet over medium heat. Add the onions and garlic and bring to golden brown, about 10 minutes. Add the liqueur (CAUTION: Skillet will flame up when using a gas range.) Add the half-and-half, hot sauce, granulated garlic, granulated onion, white pepper and ground thyme. Stir and bring to a simmer.
Add the spinach and bring back to a simmer. Turn off the flame and add the breadcrumbs and cheese. Check for consistency. If there's too much liquid, add more breadcrumbs and cheese. If it's too thick, add more half-and-half.
For the fry dredge: Whisk together the corn flour, all-purpose flour, Creole seasoning and lemon pepper in a large bowl.
For the sandwich: Melt the butter and garlic in a small skillet. Cut the French bread and "paint" the inside of the bread with the garlic butter. Firmly the press the inside of the bread down on a large skillet or flat-top grill to toast the bread.
In a large heavy-bottomed saucepan, pour enough oil to fill the pan about a third of the way. Heat over medium heat until a deep-frying thermometer inserted in the oil reaches 350 degrees F. (If you don't have a thermometer, a cube of bread will brown in about 3 minutes.) Dredge the oysters in the fry dredge and then deep-fry, in batches if necessary, until golden brown and firm to the touch, about 2 minutes.
Arrange the oysters on the inside of the bread. Top with Rockefeller sauce and garnish with Parmesan.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Use extreme caution when igniting alcohol. Remove the pan from the heat source before adding the alcohol. Pour the alcohol into the pan and carefully ignite with a match or click lighter. Return the pan to the heat and gently swirl to reduce the flames.
Recipe courtesy of Avery's On Tulane, New Orleans, LA