Preheat oven to 180°C fan / 200°C conventional. Line a 20cm square tin with baking paper.
In a bowl, stir together flour, oats and sugar. Add the melted baking block or butter, and stir until it resembles chunky breadcrumbs.
120 grams Plain flour, 50 grams Brown sugar, 100 grams Oats, 100 grams Baking block or unsalted butter
Reserve roughly ⅓ for the topping and pop in the freezer.
Tip the rest of the mixture into the tin and press down firmly to make an even base. Bake for 15 minutes until golden.
While the base bakes, chop the strawberries into smallish chunks and pop in a bowl. Add the cornflour, lemon zest and juice and toss together.
250 grams Strawberries, 1 Lemon, 1 teaspoon Cornflour
Remove the base from the oven and spoon the strawberry mixture evenly on top. Remove the oat crumble from the freezer, crumble it up and sprinkle it over the strawberries.
Bake for a further 30-35 minutes. After 20 minutes, remove the tin from the oven and pierce the strawberries with a fork to release the juices. Then return to the oven for the remaining baking time. Once baked, pop the tin in the fridge to cool and set (about 1 hour).
Melt the Milkybar chocolate and drizzle over the top. Leave to set then slice into 12 bars and enjoy!
45 grams Milkybar White chocolate