Method
Tear the chicken carcass into pieces, chopping through larger bones with a sharp cook’s knife.
Place in a large saucepan along with any skin or flavourful bits from the roasting tin. Set over a medium high heat, add a dash of olive oil followed by the vegetables, thyme, bay leaves, peppercorns and coriander seeds. Fry for 4 to 5 minutes.
Cover with about 1.5 litres fresh water and bring to a gentle simmer. Skim off any froth that rises to keep the stock clear.
Cook uncovered for 3 to 4 hours, topping up with water if needed.
Strain through a fine sieve or muslin lined sieve into a bowl and leave to cool.
When ready to serve, remove the stock from the fridge and bring to a gentle simmer. Season with salt to bring the flavours to life.
Heat a griddle pan. Lightly oil the spring onions and cook for 1 minute on each side until charred.
Place the broad bean tops in a bowl and dress with a squeeze of lemon juice, a pinch of salt and pepper and a little olive oil.
Ladle the hot broth into four warm bowls. Add a pile of dressed greens and two or three spring onions to each bowl.
Serve with extra flaky salt, black pepper and olive oil.