For the blackberry dessert sauce, wash the blackberries, drain well and boil once.
Turn through the “Fleotte Lotte”. Stoned, there should be about 1200 grams.
Heat in a large saucepan and allow to thicken slightly over low heat for 2 hours. Add sugar and lemon juice and bring to a bubbling boil.
Pour the blackberry dessert sauce into clean jars and seal tightly immediately.