Wash chicken breasts and pat dry. Place in a large pot. Clean or peel the soup greens, wash and cut into pieces. Put the soup greens, bay leaf and peppercorns in the pot.
Add approx. 1.5 litres of water so that the meat is covered. Bring everything to the boil, season with salt and simmer covered over a low heat for about 45 minutes. Wash and clean the mangetouts. Peel and wash the carrots and cut into slices.
Remove the meat from the broth and let it cool down a little. Pour stock through a sieve and collect. Measure out 1/2 litre of stock. Boil up in a pot. Cook carrots for 8 minutes, peas and sugar snap peas for 5 minutes.
Prepare rice in boiling salted water according to package instructions. Drain vegetables on a sieve, collect broth. Remove meat from skin and bones and cut into bite-sized pieces. Melt the fat in a pot and sauté the flour in it.
Add the stock while stirring. Simmer for 5 minutes. Mix cream and egg yolk and add to the sauce. Season the sauce with salt, pepper and lemon juice. Mix in vegetables and meat. Wash the chervil, dab dry.
Set something aside for garnishing, pluck the rest. Stir into the sauce. Serve the fricassee garnished with chervil, lemon peel and lemon slice. Serve with rice.