Preheat oven to Gas 6, 200°C, fan 180ºC and line a baking tray with nonstick baking paper.
Heat the olive oil and gently cook red onion until softened. Add balsamic vinegar, red wine, sugar, cranberries and cook till jammy - about 10 mins. Set aside.
Roll puff pastry on a lightly floured surface and cut into squares about 2.5cm. Bake for 10 minutes until golden and risen.
Top each square with a small slice of Camembert and a spoonful of sauce. Return to the oven until the cheese melts.
Garnish with thyme
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