For braised lamb shanks, preheat oven to 180C. Heat oil in a large frying pan over medium-high heat, season shanks to taste, add to pan in batches and cook, turning once, until browned (2-3 minutes each side). Transfer to a casserole with remaining ingredients, bring to the simmer, cover with a lid and braise in oven until meat is falling from the bone (3 hours). Set shanks aside, skim fat from braising liquid, then reduce over medium heat until slightly thickened (30-40 minutes). Return shanks to braising sauce and keep warm.