Star anise, called bat gok in Cantonese and ba jiao in Putonghua, is a common cooking spice in northern cuisine and also a key raw material used to produce Tamiflu, one of two antiviral drugs ...
is the star anise, which gives the dish a warming, aromatic feel. Preheat the oven to 200C/400F/Gas 6. To make the crumble topping, put the flour and brown sugar in a large bowl and mix well.