Wash and peel the asparagus and cut off the woody ends. Cook the asparagus in lightly salted boiling water with some sugar for 20 minutes. In the meantime, peel, wash and quarter the potatoes and cook them in salted water for about 20 minutes.
Drain and press through the potato press (or crush with a fork). Mix with vinegar. Season to taste with salt, pepper and sugar. Arrange asparagus, salmon and vinaigrette on plates.
Spread caviar on it. Serve garnished with lemon wheels and dill pennants.