Festive squash jalousie - Good Food Middle East

Ingredients

• 1 large butternut squash, chopped into chunks
• 4 garlic cloves, unpeeled and bashed
• sprig rosemary, leaves stripped and chopped
• few sprigs thyme, leaves stripped
• 3 tbsp olive oil
• 1 onion, chopped
• 1 large field mushroom, chopped
• 125g pack cooked chestnuts, broken into large pieces
• 2 tbsp chopped parsley
• 1 tbsp chopped sage
• 250g tub mascarpone
• 1 tbsp grated parmesan, Pecorino or vegetarian alternative
• pinch freshly grated nutmeg
• 500g pack puff pastry
• 1 egg, beaten