Wash mirabelle plums, cut in half and stone. Finely chop the pulp. Peel the onion and chop it very finely. Wash the chilli pepper, cut it lengthways and remove the stones and partitions. Also chop very finely. (Wear gloves if necessary.) Peel the ginger and chop it too. Clean the lemongrass and cut into approx. 4 pieces and press down a little.
Cook all prepared ingredients, sugar, apple juice and salt in a saucepan over medium heat for about 10 minutes. Stir occasionally so that the sauce doesn`t burn. Stir in the vinegar, remove the lemongrass and immediately pour the sauce into prepared glasses.
You can also use yellow plums instead of mirabelle plums.