Preheat the oven to 180℃. Grease a 20 cm square ovenproof dish.
Break the matzo into rough 3 cm square pieces, place in a bowl, cover with water for a minute, then drain and squeeze out any excess water.
In a separate bowl, whisk together the eggs, sugar, cinnamon and salt until well combined. Fold in the sultanas, apples, and matzo. Pour into the prepared dish and pour the melted butter on top, then sprinkle with the extra sugar and cinnamon.