Traditional Chicken Pie

For poaching the chicken​

• 1 small onion
• 1 small leek
• 1 celery stalk
• 1 small carrot
• 4 chicken drumsticks
• 4 chicken thighs
• 1 bay leaf
• 1 sprig of thyme
• 1.25 litres light chicken stock or water

For the pie filling​

• 2 medium carrots, peeled and cut on the diagonal into 1cm slices
• 2 medium leeks, trimmed and cut into 2cm slices
• 50 g butter
• 50 g plain flour, plus extra for dusting
• 2 tbsp...