Thinly slice the onion and crush the garlic

Chop the mushrooms into slices of about 4cm thickness each

In a frying pan heat up the olive oil and fry the onion on a low heat

Once the onions start to wilt and brown add the garlic and stir. Cook for about 30 seconds.

Add in your mushrooms and stir in the mushroom ketchup. Let the mushrooms cook down on a high heat

Use your microwave to defrost the spinach and then add it to the mushrooms, but leave the water out

Finely chop half of your brie and stir it in with the mushrooms and spinach. Let it cook on a high heat until most of the moisture is gone.

Lay out your puff pastry and spread the filling you just made in the middle

Fold the sides of the puff pastry over to form a circle without covering the filling

Brush the edges with some oil and bake for 15 minutes

Five minutes before the end of the cooking time, chop the rest of the brie and sprinkle it over the pastry filling.

Garnish with fresh flat leaf parsley and serve