Cut the flesh of the pineapple into large cubes and then puree in a blender.
Grind the vanilla sticks and add them to the pineapple.
Bring to the boil together with the gelling sugar, boil for about 3-4 minutes and make a gelling test, fill hot into sterilized jars, close immediately and turn upside down, turn over again after about 1 hour and allow to cool.
The jam only tastes good when it has stood for a few days, then the taste of the vanilla pod has really pulled through.