Plum Tarte Tatin with Lavender Cream

plain flour (for dusting)

all-butter puff pastry

cups- ripe but firm plums

sugar

Kirsch

vanilla pod (halved lengthways, seeds scraped out)

butter (cubed)

cup- heavy/double cream

tbsp- granulated sugar or use lavender infused sugar from Sainsburry's

tsp- dried lavender buds (skip if using lavender infused sugar)