The diced fruits are put in a larger pot, along with the schnapps or liqueurs and the preserving sugar. Let it boil briefly once.
The fruits begin to crumble, now puree. Simmer for about 4 minutes while stirring. Meanwhile add the quartered strawberries, they should still be recognizable as strawberries.
If the jam is too firm during the jelly test, just add a shot of schnapps, if it is too soft, add 1 - 2 tablespoons of jam sugar and cook for another 4 minutes.
When the consistency is as desired, pour the jam into jars that have been rinsed with hot water and turn the closed jars upside down.