Heat the oil in the large pot on high heat
Add half the beef and brown, remove and add the remaining beef. Set the beef aside
Add the spice paste and cook for 2 – 3 minutes (WARNING – open the windows and put the exhaust fan on – once the chillies are heated your eyes are going to water!)
Return the beef to the pot and add the remaining curry ingredients.
Bring to a simmer and then lower the heat.
Pop the lid on and leave to simmer for 1hr 15mins
Check the beef, if it falls apart take it out of the pot. and set aside. If the beef is just tender and holding together leave it in.
Raise the heat to medium and cook for 30 – 40 mins, stir occasionally. Towards the last 10 mins stir more frequently to make sure the the sauce reduces to a paste.
Return the beef to the pot. Note: The beef should fall apart at a touch, if not add some water and keep cooking.
Remove the cinnamon stick, star anise and kaffir leaves.
Serve with your choice of rice