Put the freezer bowl in your freezer at last over night (or according to the instructions of your ice cream maker).

Put the cream cheese, sugar, salt, heavy cream, sour cream and olive oil into a bowl.

With the help of a hand mixer, combine all these ingredients until smooth.

Add the diced plums. Stir them in with a spoon.

Pluck the rosemary leaves of the branch and stir them also in.

Refrigerate the ice cream mixture for at least 2 hours.

Start your ice cream maker.

Pour the ice cream mixture into the freezer bowl and let mix until the ice cream is done.

Put the mixture in a container and continue to freeze it.