Vegetarian Spring Pie – Bennett Opie

Ingredients

• 4 sheets of filo pastry
• 200g of leeks, chopped
• 200g tenderstem broccoli
• 200g of asparagus, sliced into 2cm pieces
• 100ml vegetable stock
• 1 garlic clove, crushed
• 100g of peas, fresh or frozen
• 1tsp dijon mustard
• 100g double cream
• 2 tbsp Opies Pickled Onions
• 25g of flat-leaf parsley, finely chopped
• 1 tbsp Opies Pickled Onion Brine
• 50g of butter (can use vegan butter if making it vegan)