Baked Crumble Bars
https://www.youtube.com/watch?v=D0zJ5A420jE 300g Blackberries 50g Caster Sugar Squeeze of Lemon Juice 100g Oats 100g Caster Sugar 100g Light Brown Sugar 230g Plain Flour 1/2tsp Salt 1/2 tsp Cinnamon 1/2 tsp Vanilla Extract 1 Small Egg 130g Unsalted Butter Melted