1. Preheat the oven to 325°F and line a baking tray with greaseproof paper.
2. Place the raspberries and caster sugar in a small saucepan over a low heat. Stir until the sugar is completely dissolved and cook for a further 2 to 3 minutes until the raspberries have turned to mush. Remove from the heat and pass through a sieve using the back of your spoon to push through. The syrup consistency should be thick. Set aside and allow to cool.
2.Use an electric mixer to whisk the egg whites in a clean, dry bowl until firm peaks form. Gradually add the sugar, 1 tablespoon at a time, whisking constantly until mixture is thick and glossy and sugar completely dissolves. Add the cornstarch, vinegar and coffee extract and gently fold until combined.
3. Pour the mixture onto the prepared baking tray in a circle shape and use the back of a wooden spoon to shape the meringue into a nest. Using a teaspoon drizzle half of the cooled raspberry syrup around the meringue to create a ripple effect. Place the meringue in the pre-heated oven and turn the heat of the oven down to 285°F and leave to bake for 1.5hrs. Once the meringue is baked, turn off the heat, open the oven door and allow it to cool completely. I usually make the meringue the night before to take off the pressure.
4.When the meringue is cooled and ready to serve you can start assembling the filling. You don’t want to add the cream too far in advance, as it will soak into the meringue. Gently whip the cream until it thickens and then whisk in icing sugar and the Kerrygold Irish Cream Liqueur. Spoon the filling into the center of the meringue and then add the fresh raspberries followed by the remaining raspberry syrup.