Trim and slice the fennel. Finely slice the onion and garlic.
Heat the oil in a heavy based casserole dish. Add the chicken, season with salt and cook for a few minutes on each side until light brown. Remove them to a plate.
Add the onion, fennel and lardons and cook for 3-4 minutes, then add the garlic and stir for a minute. Return the chicken and add the stock.
Bring to the boil then, on a low temperature, simmer for 30 minutes.
Add the peas and beans and cook for a further 5 minutes.
Add the peas & beans and cook for a further 5 minutes. Stir in the lemon zest & juice, followed by the herbs.
Serve with a spoonful of yoghurt or Crème fraîche, if you like.