Healthier Cheesecake

• 340 g Greek yoghurt
• 500 g cottage cheese
• .3 cup caster sugar
• 1 tbsp lemon juice
• 2 tsp vanilla
• 3 eggs
• 1 tbsp corn flour
• 300 g whole-wheat digestive biscuits
• 150 g butter, melted
• 1 cup frozen berries to serve