Peel and finely chop the onion. Peel, wash and finely dice the carrot. Heat 1 tablespoon of oil in a pot and fry onion and carrot. Add the cardinal lentils, pour 450 ml water and bring to the boil.
Cover and simmer for about 25 minutes.
For the salsa, wash the coriander, shake dry and chop very finely. Mix with 7 tablespoons of oil. Season with salt, pepper, sugar and 1 pinch of ground coriander.
Wash the lemon hot, dab dry and peel in thin strips with a zest ripper. Halve the lemon and squeeze it. Remove the lentils from the stove. Stir in lemon juice and zest.
Season with salt, pepper and 1 pinch of sugar. Leave to cool.
Remove the salmon from the skin, carefully pluck it and lift it under the lentils. Arrange. Cut the cress from the bed and sprinkle on top. Add the coriander salsa.