Pre heat oven to 190C / 170C fan-forced.

In a large bowl beat the butter and sugars with an electric mixer until pale and creamy.  Add the egg and beat agin until combined.  Add the oats, flour and baking powder and mix with a wooden spoon.  Finally stir through the tahini and honey.

Roll tablespoons of mixture into balls, place onto baking tray and with a slightly wet hand, press down with your palm to flatten.  Sprinkle with pepitas and sesame seeds and bake for 15 minutes.  Carefully use a spatula to slide cookies off tray onto wire cooling rack while still warm and then allow to cool.