Key Lime Pie

Base

• 255 g graham crackers
• 30 g sugar
• 140 g unsalted butter, diced, plus extra for greasing

Filling

• 2 limes, thin peelings of skin only
• 1 Tbsp caster sugar
• 4 egg yolks, from large eggs
• 1 tin sweetened condensed milk (approx. 397 g)
• 100 g lime juice, freshly squeezed