Begin by cooking the beetroots. Scrub them clean, then place in a pan with the bottle of mulled wine. Simmer for an hour or until the beets are soft all the way through (top up with a little water if needed). Lift the beetroots out of the wine and peel whilst still warm

Continue simmering the mulled wine until it has reduced down to a syrupy consistency while you get on with the rest of the recipe

Place the dried mushrooms in a jug and pour over 500ml of boiling water. Leave to soak for at least 10 minutes

To make the gravy, fry the onions and garlic in a splash of oil over a low heat until golden and caramelised (about ten minutes). Add the thyme sprigs to the pan

Place a fine sieve over a bowl and strain the mushrooms, reserving the liquid. Roughly chop the mushrooms then add to the pan with the onions. Stir in the mustard and Marmite, followed by the flour. Cook out for a couple of minutes, constantly stirring to avoid any burning

Add the mushroom stock and reduce until thick and glossy. Add the soy sauce and reduced mulled wine, then pass through a sieve to get a nice smooth sauce. Taste and season with salt if needed, then set aside to reheat before serving

To make the duxelle, place the mushrooms in a blender and blitz to a fine rubble (or very finely chop if you don't have a blender). Add them to a frying pan with a splash of oil and the soy sauce and cook down until the mushrooms are tender and all the liquid has evaporated

Wilt the spinach in a pan over a medium heat for a few minutes, just enough to collapse the leaves. Remove from the pan and pat dry with kitchen paper, then leave to cool

You are now ready to assemble the parcels. Take the circles of pastry and spread out the spinach on each, leaving a 1cm gap around the edge. Spread out the mushroom duxelle then place the beetroot in the centre. Carefully fold the pastry up around the beetroot and seal together. Place on a greaseproof-lined tray, seal-side down

Place the parcels in the fridge for 10 minutes whilst you preheat the oven to 200°C/gas mark 6

Use a small knife to score lines into the pastry, then glaze with coconut oil and place in the oven for 35 minutes until golden. If they are starting to darken too much in colour, turn the temperature down to 170°C/gas mark 3 after 15 minutes

To serve, reheat the mulled wine gravy and bring the parcels to the table with your side dishes