Balsamic-roasted strawberries and cream

In this creamy, just-sweet-enough treat, inspired by an English fool, jammy roasted strawberries are gently folded into billowy whipped cream and topped with crunchy roasted hazelnuts. When strawberries are tossed with nothing but olive oil and balsamic vinegar then slipped into a hot oven, their natural sugars are drawn out and commingle with the sweet-tart vinegar, enveloping the fruit in a juicy, concentrated syrup. That means that even berries that aren't peak-season are successful here.