Grapefruit meringue pie

Ingredients

• Pastry
• 175 gram plain flour
• 50 gram icing sugar
• 85 gram cold butter, cut into cubes
• 2 free-range egg yolks
• Filling
• 225 millilitre grapefruit juice
• finely grated zest 1 grapefruit
• 1 cup caster sugar
• 3 free-range eggs
• 4 free-range egg yolks
• 150 gram butter, cut into cubes
• 1 tablespoon cornflour mixed with 2 tbsp water
• Meringue
• 600 gram caster sugar
• 2/3 cup water
• 8 egg whites
• 1/2 teaspoon vanilla paste
• To serve
• soft whipped cream