Wash and clean the strawberries and puree them with a hand blender. Then put the sugar with the strawberries in a saucepan, stir well and bring to the boil.

Scrape out the vanilla stick and add the strawberries to the boil, add a little vanilla flavor if necessary.

Rinse the glasses with hot water.

Let the strawberries boil for about 3 minutes, then fill them into glasses and close them immediately, leave the glasses upside down for about 5 minutes and then let them cool down.