Weigh out mix into bowl and add water, beat for 1 minute of slow speed.
Scrape down and beat for a further 4 minutes on medium speed.
Add blueberries to mixing bowl, mix for 10 seconds to fold into mix.
Pour mix into a lined gastro tin and spread evenly.
Bake for 25-30 minutes at 175C in the Turbofan.
Cooking times and temperatures may vary depending on type of oven used.