For the almond hearts, mix the egg whites with the jam. Add the powdered sugar and almonds and let rest for about 20 minutes.
Roll out the mixture on a sugared work surface to about 1/2 cm thick and cut out hearts. Place hearts on a baking tray lined with baking paper and sprinkle with chopped almonds.
Bake in the preheated oven at 180°C for about 8 minutes. Allow the almond hearts to cool briefly and sprinkle with powdered sugar.