Peel the apples and remove the center
Cut the apples in small pieces and add to a sauce pan together with the lemon juice to avoid the apples turning brown
Open the vanilla bean and add only the grains to the sauce pan
Add the rest of the ingredients
Cook, uncovered until the apples are completely tender and the mixture has thickened (approx 30 minutes, but it depends on the waterleve in your apples and how thick you want your spread)
Mix with a handmixer until the mixture is completely smooth
Add the mixture to a sterilized jam glass and close the lid while still boiling hot to keep it in the fridge for approx 1 month. If you want to keep it longer you can freeze it.