Preheat the oven to 200˚C. Take your puff pastry from the fridge. Roll it on a heavily floured surface until it’s approx. 2cm thick. Cut into a rough circle using your tart case or ring.

Unravel the puff pastry and roll out to a slightly thinner ... 7. As you remove the tart from the oven, drizzle with a little extra virgin olive oil. Scatter over the pickled shallot and serve ...

Puff pastry is a reliable party staple ... caramelized onions and plenty of sharp Gruyère cheese, this party-ready tart packs the rich depth of French onion soup into every bite.

But do not make the pastry too wet — it should come away cleanly from the bowl. Flatten into a round and wrap in parchment paper and rest in the fridge for 15 minutes. Line the flan ring.