Wash the meat, dab dry. Fry in hot oil on each side for about 3-4 minutes. Season with salt and pepper, remove from the pan and let it cool down. Blanch peas in boiling salted water for about 2 minutes, rinse with cold water and drain.
Put the pineapple on a sieve and collect the juice. Cut the pineapple rings into small slices. Clean, wash and quarter the radishes. Clean, wash and quarter iceberg lettuce and cut into fine strips.
Wash the chervil, pluck it from the stalks and chop it coarsely, except for a few leaves. Mix mayonnaise, yoghurt, chopped chervil and 2 tablespoons of pineapple juice. Season the sauce with salt, pepper and juice.
Dice the chicken meat. Mix the prepared ingredients with the sauce, except for the iceberg lettuce. Arrange iceberg lettuce on a plate. Spread chicken salad on top. Serve garnished with the remaining chervil.