Peel and halve the pineapple and cut out the hard stalk. Dice the flesh. Weigh 600 g of flesh. Wash and stone plums and cut them into pieces. Weigh 400 g fruit flesh. Halve the lemon and squeeze the juice. Peel ginger and dice very finely. Mix fruit pieces, lemon juice, ginger and jam sugar in a large pot. Leave to stand for 3-4 hours. In the meantime wash lemon balm, dab dry, pluck leaves and cut into fine strips. Bring everything to the boil while stirring constantly and then boil for at least 4 minutes until it is bubbling. Stir in lemon balm. Fill jam immediately into prepared twist-off jars, close them. Let cool upside down
Preparation time approx. 30 minutes
waiting time 3-4 hours
Shelf life 9-12 months