Ingredients

1. 3 tablespoons olive oil
2. 2 meaty lamb shanks (1 pound each)
3. Salt and freshly ground pepper
4. 8 garlic cloves, 6 unpeeled, 2 minced
5. 3 celery ribs, coarsely chopped
6. 2 carrots, coarsely chopped
7. 1 large onion, coarsely chopped
8. 1/4 cup tomato paste
9. 2 cups dry red wine
10. 4 cups chicken stock or canned low-sodium broth
11. One 3-inch strip of orange zest
12. 1 1/2 pounds butternut squash, peeled and cut into 1-inch cubes
13. 2 tablespoons chopped parsley
14. 2 teaspoons finely grated lemon zest
15. 2/3 cup cooked cannellini beans

Directions

1. Heat 2 tablespoons of the olive oil in a large enameled cast-iron casserole. Season the lamb shanks with salt and pepper, add them to the casserole and brown well on all sides, about 8 minutes. Transfer the shanks to a plate.
2. 2. Preheat the oven to 350°. Add the unpeeled garlic cloves, celery, carrots and onion to the casserole and cook over moderate heat, stirring occasionally, until golden brown, about 8 minutes. Add the tomato paste and cook, stirring, until glossy, about 2 minutes. Add the wine and boil over high heat until the liquid is very syrupy, about 15 minutes.
3. 3. Return the shanks to the casserole and add the stock and orange zest. Bring to a simmer. Cover the casserole and braise the shanks in the oven for about 2 hours, or until the meat is very tender; turn the shanks from time to time as they cook.
4. 4. Meanwhile, on a large rimmed baking sheet, toss the squash cubes with the remaining 1 tablespoon of olive oil. Season with salt and pepper and bake in the oven (along with the lamb) for about 1 hour, or until tender.
5. 5. In a small bowl, mix the minced garlic with the parsley and lemon zest. Set the gremolata aside.
6. 6. Remove the shanks from the oven and transfer to a plate. Pass the sauce through a coarse strainer, pressing hard on the vegetables. Skim the fat from the surface of the sauce.
7. 7. Return the sauce to the casserole, season with salt and pepper and bring to a boil over moderately high heat. Add the lamb shanks and squash and simmer just until warmed through. Add the cannellini beans, cover and remove from the heat. Let stand for a few minutes to allow the flavors to blend.
8. 8. Spoon the vegetables and sauce into 2 large shallow bowls and set the lamb shanks on top. Garnish with the gremolata and serve.

Make Ahead

The recipe can be prepared through Step 6 and refrigerated for up to 2 days.