Veggie Pies

Ingredients

• 1 brown onion, finely chopped
• 50 g butter, chopped
• 1 carrot, chopped
• 1 stick celery, chopped
• 1 tsp dried thyme
• 100 g button mushrooms, sliced
• 50 g broccoli, cut into small florets
• 75 g zucchini, roughly grated
• ¼ cup frozen peas
• ¼ cup flour
• 2 cups vegetable or chicken stock
• ⅓ cup thickened cream
• Salt
• cracked black pepper
• Mashed potato, to serve