Giant Christmas 'Sausage' Roll | BOSH!

Ingredients

• 2 tbsp maple syrup
• 1 tbsp olive oil
• 2 tbsp soy sauce
• 2 tbsp Nooch
• 2 tbsp chickpea flour
• 1 tsp thyme
• 2 tbsp water
• 2 tbsp olive oil - To Brush
• 3 parsnips
• 2 tbsp olive oil
• 100g hazelnuts
• 150g chestnut mushrooms
• 1 red onion
• 1 x 400g can of butter beans
• 1 x 400g can of cannellini beans
• 100ml vegetable stock
• 2 garlic cloves - crushed
• ¼ tsp pepper
• 1 ½ tsp fennel seeds
• ½ tsp ground cloves
• ½ tsp ground ginger
• ½ tsp allspice
• 100g pre-cooked chestnuts
• 200g brown breadcrumbs
• 1 sheet of plant-based puff pastry
• 2 tsp salt
• Salt & pepper to taste