Preheat oven to 160°C. Heat oil in a large flameproof casserole dish over a high heat. Add shanks and brown all over. Remove shanks from dish

Reduce heat to medium. Add onion and cook, stirring occasionally for 8 minutes or until soft. Add simmer sauce and water and stir to combine. Bring to simmer. Add shanks and stir to coat with sauce. Cover casserole dish and bake 1 hour. Remove from oven; turn shanks, then cover and bake for an hour longer or until meat is very tender

Remove from oven. Stir, cover and allow to stand for 10 minutes. Top with coriander leaves

Serve with basmati rice, minted yoghurt and warm naan bread