Grease a 20cm x 30cm pan with oil.
Stir sugar and water in a medium saucepan on medium-low heat until sugar dissolves. Increase heat to high and bring to boil. Boil, without stirring, for 10-12 minutes or until dark caramel in colour. Add nuts and cook for 4 minutes on medium heat, stirring occasionally.
Pour mixture into prepared pan and spread nuts evenly. Allow to cool completely.
Turn out of pan and cut into shards. Store in an airtight jar.