Crostata di Marmalata (Italian Jam Tart)

Mixed Berry Jam

• 1 lemon
• 500 g fresh mixed berries (e.g raspberries, blackberries, blueberries) (see tips)
  ou 500 g frozen mixed berries (e.g raspberries, blackberries, blueberries) (see tips)
• 250 g rapadura sugar
• 1 vanilla pod split lengthways, seeds scraped

Pastry

• 150 g unsalted butter chilled, diced, plus extra for greasing
• 1 lemon zest only, no white pith
• 300 g plain flour plus extra for dusting
• 100 g caster sugar
• 1 pinch fine sea salt
• 3 egg yolks
• 30 g whole milk for brushing
• 30 g coconut, shredded toasted, for garnishing (optionnel)