Cover the bottom of a greased or parchment-lined dish with slices of toast. Beat the eggs and whisk with the cream and brown sugar and pour them over the toast. Sprinkle with cinnamon sugar as desired and top with diced marzipan.
Peel the apples, cut into small pieces and drizzle with lemon juice so that they do not turn brown, then spread them on the toast base and sprinkle with a little cinnamon sugar again.
Bake in a preheated oven at 160 ° C (fan oven) for about 25 minutes.
Serve warm and possibly serve with whipped cream or sour cream.