Grapefruit-marmelade

6 grapefruits
1 Briefchen (30g) Gelierpulver, z. B. M-Gel
1 Vanilleschote
1/2-1 tsp chilli flakes (ready made)
600g sugar

Peel grapefruits. Remove the white skin completely. Cut out the Fruchtfilets. Squeeze juice. Cut Vanilleschote lengthwise into half and add to the chilli flakes in the pot. Mix well and boil. Add sugar and cook for 4 minutes. Fill the prepared jars and close well.

Tipp: suits cheese or Tafelspitz.