Preheat your oven to 500F.
Toss the lamb shanks, chopped white onions, and chopped carrots in the vegetable oil.
Salt the lamb shanks all over with a light coating of kosher salt.
Place the lamb shanks and vegetables on a piece of parchment on a sheet tray in the oven.
Roast the lamb and vegetables at 500F for about 12 minutes until the mixture is barely golden-brown, turning the ingredients after about eight minutes, so you don’t have anything burn.
Once you have achieved the desired golden-brown color on the lamb, remove the lightly roasted meat and vegetables from the oven and reduce the oven temperature down to 275F.
Cook down 2 cups of red wine to 1 cup on the stove.
Combine the reduced red wine with the 4 cups of beef stock in a large Dutch oven, and bring to a simmer on the stove.
Add the lamb shanks, onions, and carrots from earlier.
Add the celery stalk, bay leaves, garlic cloves, fresh thyme, and fresh rosemary.
Cover with the lid and cook in the oven at 275F for roughly 3 hours, or until the lamb meat is falling off the bone.
When your lamb shanks are finally ready, it is time to make your couscous.
Begin by lightly toasting your pine nuts over medium heat, stirring frequently, toasting them in a dry saute pan with no added fat.
Remove the lightly-toasted pine nuts from the pan, and set them aside.
Add the finely-minced shallot and 2 Tbsp of salted butter to a pot on the stove.
Add the 1 cup plus 2 Tbsp of chicken stock to the pot, and bring the liquid to a simmer.
Add the dry couscous and orange juice to the simmering stock.
Add the finely-minced fresh dates and the lightly toasted pine nuts.
Gently stir the mixture once and cover tightly with a lid or aluminum foil and reduce heat down to the lowest setting.
Steam the couscous over the lowest heat for the amount of time specified on your couscous packaging, or roughly 5-12 minutes.
When the couscous has cooked for the appropriate amount of time, remove it from the heat, remove the lid, and gently fluff the couscous grains with a fork to separate them.
Taste and season with kosher salt & freshly-ground black pepper.
Serve the couscous mixture in deep bowls, topped with the lamb shanks from the oven, topped with a ladle of the lamb braising liquid.
Garnish each bowl with the fresh mint and parsley.