Ingredients:

• 1 1/4 cups (160g) all-purpose flour
• 1/2 cup (113g) cold butter
• 1/4 teaspoon salt
• 3-4 tablespoons cold water
• 1 cup (200g) sugar
• 1/4 cup (30g) cornstarch
• 1/2 cup (120ml) lemon juice
• Zest of 2 lemons
• 4 large egg yolks
• 3 large egg whites
• 1/4 teaspoon cream of tartar
• 6 tablespoons (75g) sugar (for meringue)