Sernik rosa slice

Base

• 65 g unsalted butter, cut into pieces (1-2 cm), plus extra to grease
• 50 g milk
• 15 g white sugar
• 1 egg
• 100 g self-raising flour

Cheesecake filling

• 1 lemon, zest only, no white pith
• 250 g white sugar
• 1000 g quark (see Tips)
• 5 egg yolks
• 80 g cornflour
• 650 g milk
• 40 g freshly squeezed lemon juice (approx. 1 lemon)
• 120 g grapeseed oil

Meringue topping

• 100 g white sugar
• 5 egg whites
• 1 pinch sea salt