Festive filled brioche centrepiece with baked camembert

Name: Festive filled brioche centrepiece with baked camembert
Ingredients: 4 large eggs; 20ml milk; 350g strong white bread flour; 7g sachet fast-action dried yeast; 30g caster sugar; 5g salt; ½ tsp mixed spice; 200g unsalted butter cubed and softened; 1 egg beaten with a pinch of salt; scattering of poppy seed; 1 whole 250g camembert in a wooden, stapled carton; 2-3 sprigs thyme; 1 garlic bulb; 1 tbsp quince paste (membrillo), mashed; 5 cooked chestnut halves; ½ tbsp dried, chopped cranberry mixed with ½ tbsp cranberry sauce; 1 tbsp mushroom pâté; 30g fresh cranberry; rosemary springs or bay leaves