Classic Christmas Turkey with Stuffing

Ingredients

• ½ cup salted butter
• 2 leeks, halved, thinly sliced
• 4 stalks celery, diced
• 3 cloves garlic, minced
• ¾ tsp salt
• ½ tsp freshly ground black pepper
• 400 g day old sourdough bread, roughly chopped
• ¼ cup fresh sage, chopped
• ¼ cup flat leaf parsley, chopped
• 1 tsp rosemary, chopped
• 1 tsp thyme leaves
• 1 ½ cups vegetable stock
• 7 – 8 kg whole turkey
• ½ cup unsalted butter, softened
• Salt, to taste
• Freshly ground black pepper, to taste
• 1 ½ litres chicken stock, divided