While the rolls are baking, prepare the dressing.
Put raspberry syrup, water, agar agar in a pot and mix well and bring to a boil.
When it starts to boil, while stirring constantly, pour in the mixture of concentrate and water.
Cook for about 3 minutes and stir several times in between.
Set aside and leave for about 20 minutes for the dressing to cool and thicken a little.
When the rolls are baked, cover them with raspberry dressing, let the dressing cool and thicken, and then cover them with melted white chocolate.