Line a 2lb Loaf Tin with cling film, leaving excess hanging over the sides. Set aside.
Cut out two sheets of non stick parchment paper to fit a large baking tray.
On both sheets of parchment, trace around the base of the loaf tin to give you 6 rectangles in total.
Melt the Dr. Oetker Milk Chocolate according to packet instructions.
On one sheet of parchment, add 1tbsp of chocolate to the centre of each rectangle. Using the back of a spoon, spread the chocolate evenly while staying within the lines.
Place the sheet onto a baking tray and allow to set in the fridge for about 5 minutes.
Repeat Step 3 with the second piece of parchment. Remove the baking tray from the fridge and place the second sheet on top. Return to the fridge until set and ready to use.
Wash and remove the stalks from the strawberries. On a chopping board, roughly chop the strawberries into small pieces.
In a large pot over a high heat, add the strawberries and the caster sugar. Allow to cook for 5 minutes, until the sugar has dissolved, while stirring continuously.
Reduce the heat to low and cook for a further 10-15 minutes, until the strawberries have thickened and become syrupy. Give them a stir every few minutes to avoid burning. Set aside and allow to cool fully.
In a large bowl whisk together the custard, mascarpone, Dr. Oetker Liquid Glucose and the Taylor & Colledge Vanilla Bean Paste until smooth.
Gently fold in the cooled strawberry mix and the whipped cream, until just combined.
To assemble, remove the chocolate from the fridge. Gently remove one sheet of chocolate and add it to the base of your prepared loaf tin. Add about 8 tbsp of the strawberry mix on top and gently level it out with the back of a spoon.
Repeat Step 11, alternating between sheets of chocolate and the strawberry mix. Finish with the final layer of chocolate.
Cover with the overhanging cling film and place in the freezer for 8 hours or overnight.
Once set remove from the freezer. Take it out of the loaf tin and peel off the cling film. Use a knife sitting in boiling water to slice through the terrine. Serve with fresh strawberries.