Wash the asparagus, peel the white one completely, in the case of the green one, peel only the lower third. Cook the asparagus in boiling salted water for about 18 minutes. In the meantime, carefully wash the chervil, dab dry and pluck from the stalk. Foam up fat in a pan, sprinkle half of the chervil over it. Remove the asparagus from the water and allow to drain. Pour chervil butter over the asparagus and arrange on plates with the salmon. Serve sprinkled with remaining chervil and coloured pepper