The rich, tangy creme fraiche and a bit of vinegar cut the sweetness of the macerated berries in this parfait. You can also use vanilla ice cream in place of the creme fraiche.
Combine berries in a medium bowl. Sprinkle with sugar and vinegar. Let sit, stirring occasionally, until berries soften and start to release juices, about 30 minutes.
Layer berries with creme fraiche in parfait glasses. Serve immediately or refrigerate up to 3 hours. Just before serving, sprinkle with crumbled amaretti biscuits.