Wash the asparagus, peel and cut off the woody ends. Put asparagus in boiling salted water with 1 level teaspoon of sugar and juice of 1/2 lemon, bring to the boil and cook for about 15 minutes. Cook ##noodles## in boiling salted water according to package instructions.
##Salmon## cut into thin strips. Peel onion and chop finely. Melt the fat in a pot and sauté ##onion## in it. Stir in flour and sweat briefly.
Add stock and cream while stirring. Let the sauce simmer for about 2 minutes while stirring occasionally, then add 2-3 tbsp. lemon juice. Season the sauce with salt, pepper and possibly some sugar.
Wash the dill, shake dry and chop the flags finely, except for a few for garnishing. Stir the chopped dill into the sauce. Add the laughing strips at the end and stir in briefly. ##Asparagus## and drain the noodles.
Cut the asparagus into small pieces and add to the sauce. Arrange noodles and asparagus-lemon-dill sauce on plates. Garnish with remaining dill flags.