Combine the molasses and vinegar in a bowl and stir to mix (I like to use large resealable plastic bags for marinating). Add the wine, bourbon, bay leaves, garlic, rosemary, and red pepper flakes. Mix well and marinate the lamb shanks in this mixture, refrigerated for 24 hours. Turn the lamb in the marinade occasionally. Remove from refrigerator 1 hour before cooking.
Preheat oven to 350 degrees F.
Remove the lamb from the marinade, wiping off any excess and season liberally with salt and pepper. Reserve the marinade.
Heat a large, heavy skillet over medium-high heat; add olive oil. Sear the lamb shanks on all sides until deeply browned. Transfer lamb to a deep oven-proof baking or roasting pan large enough to hold the lamb in one layer. Pour the reserved marinade over the lamb and add chicken stock to the level of the top of the lamb.
Cook over high heat until the liquid comes to a simmer; remove from heat. Cover pan tightly with a lid or aluminum foil and transfer to the bottom rack of the oven. Cook the lamb for 1 1/2 to 2 hours or until meat is meltingly tender. To test, insert a knife or skewer into a thick section (there should be no resistance and the juices should run clear). Remove from oven and cool completely at room temperature; refrigerate lamb and braising liquids, covered, overnight.
Prepare Creole Baked Beans; refrigerate until ready to serve.
Prepare Creole Spice Blend (see below); set aside.
Preheat oven to 300 degrees F.
In a large heavy pot, heat olive oil. Add the onion, celery, and pepper; cook until softened and lightly caramelized. Add garlic, bay leaf, red pepper flakes, and Creole Spice Blend; cook 2 minutes.
Stir in the brown sugar, mustard, tomatoes, drained beans, and enough chicken or lamb stock. Stir well, bring to a boil; cover pan with aluminum foil and then a tight-fitting lid. Transfer to the oven and bake for 1 1/2 to 2 hours; check the stock regularly and add more if necessary. Cook until the beans are tender and most of the stock is absorbed. Season generously with salt. Refrigerate overnight or longer (the flavor improves is these beans are made 1 to 2 days in advance.
Prepare Arugula Gremolata (see below); set aside.
Remove the lamb shanks (with the braising liquid) from the refrigerator; scrape all the congealed fat from the surface and warm in a pan over medium-low heat for 10 minutes. Lift the lamb from the pan to a platter. Strain the solids from the braising liquid and return all but 1 1/2 cups of the braising liquid to the roasting pan. Return the lamb to the pan and warm over medium heat to heat the lamb thoroughly. Keep warm.
Transfer the reserved braising liquid to a saucepan; bring to a boil over high heat. Reduce heat to medium and cook, skimming impurities from liquid, until reduced by half. Season with additional salt and pepper if needed and keep warm.
Heat the prepared Creole Baked Beans in a saucepan until warmed through. Season with salt and pepper; add the oregano and parsley. If needed, adjust the acidity with cider vinegar. Divide beans between six warm wide-rimmed soup bowls. With a slotted spoon, lift the hot lamb osso buco from the braising liquid and place one in each bowl on top of the beans.
Spoon reduced braising liquid over the Lamb Osso Buco and divide the Arugula Gremolata on top of each portion. Serve immediately.
Makes 6 servings.
* Lamb shanks are an inexpensive cut of lamb that comes from the latter part of the fore or hind leg. Lamb shanks are best roasted or braised. Shanks are almost always cooked in liquid until the meat starts separating from the bone.
** Learn how easy it is to make your own homemade chicken stock.
Lamb Osso Buco Recipe: https://whatscookingamerica.net/lambossobuco.htm