method

• Preheat the oven to 175c, line and grease well a 20cm X 20cm tin. To make the crust add the butter, sugar, flour, salt, and lemon zest to a large bowl. Use your fingers to work the mixture into a rough dough, the flour won’t be entirely incorporated but that’s fine. To make the crumble top separate ⅓ of the dough, place it in a small bowl, add the oats to it, combining the oats into the mixture to create a crumble for the top, set aside.
• Tip the remaining ⅔ of the dough into your prepared tin and spread the dough out across the bottom of the tin gently and evenly with your fingers until it covers the base of the tin. Bake in the oven for 30 minutes until slightly browned around the edges.
• To make the filling add the eggs, yogurt, flour, sugar, cinnamon, nutmeg and allspice to a large bowl, use a hand blender or whisk until it is combined completely.
• Add the blackberries and cubed apples to the cooked crust to form an even layer. Pour the filling on top of the layer of fruit and shake the tin gently from side to side to make sure it reaches the edges of the tin. Distribute the oat crumb over the top evenly, return it to the oven and cook for a further 25 minutes until the filling has set. Remove from the oven and allow to cool. Cut into squares and serve.
• Bring a pot of water to a low boil. Place a heatproof bowl over the top of the pot, making sure the bottom of the bowl does not touch the boiling water.
• Add in the custard and the chocolate to the bowl, stir gently until the chocolate is melted, remove from the heat and allow to cool completely.
• Add a layer of the chocolate sponge into each of the serving glasses, a layer of the dark cherry yogurt, a layer of the cooled chocolate custard and cherries, top with a dollop of natural greek yogurt.
• Garnish with a dusting of cocoa powder, a cherry, a sprig of mint and serve immediately.