Method

• 1.
  For the braising liquid, combine all the ingredients with 4L (16 cups) water in a large saucepan (or divide mixture evenly between two smaller pans) over high heat and bring to the boil. Reduce to a simmer and cook for 10 minutes to infuse.

• 2.
  Meanwhile, heat oil in a large frypan over high heat. Add beef, in batches if necessary, and cook, turning, until browned on all sides.
• 3.
  Add beef to braising liquid. Cover and cook at a gentle simmer for 2 hours 30 minutes or until beef is very tender. Remove from heat and set aside, covered, for 2 hours to steep.
• 4.
  Strain braising liquid through a fine sieve into a separate saucepan, reserving beef, shiitake, cinnamon and one-third wakame. Discard remaining ingredients.
• 5.
  Place reserved braising liquid over high heat and bring to the boil. Cook, stirring occasionally, for 30 minutes or until reduced by half.
• 6.
  Return beef, shiitake, cinnamon and wakame to braising liquid and cook for 3 minutes or until heated through. Divide among bowls and serve.