Bostock's Organic Free Range Chicken NZ

Ingredients

• 1 x free-range Bostock Brothers organic chicken (size 14)
• 50g butter, softened
• 2 tablespoons chopped flat-leaf parsley
• 2 teaspoons finely chopped fresh sage leaves, plus 3 extra small sprigs
• finely grated zest and juice of 1 lemon
• salt and pepper
• 25g butter, softened
• 3 cloves garlic, crushed
• 2 teaspoons finely chopped fresh sage leaves
• 2-3 thick slices of sourdough bread
• 2 tablespoons very roughly chopped fresh walnuts
• 6 medium roasting potatoes, scrubbed
• oil and salt for rubbing
• 2 tablespoons plain flour
• 2 cups chicken stock or more if needed (you can also use the vegetable cooking water to replace stock)