From scratch:

Now just needs to cool a little, then add ice-cream and friends.

If you’ve not tried flat peaches, they’re lovely; they satisfy Muffett’s Law of Ugly Food[1] and are a lot sweeter. Small pips, too.

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[1] “generally tastier because a) they have to be and b) they are less popular so more likely to not yet be cultivated into blandness, modulo the Delia effect.”