Peel and finely dice the onion and sauté in 2 tablespoons of butter. Sweat 2 tablespoons of flour in it. 1⁄4 l Stir in water, milk and stock, bring to the boil and simmer for about 5 minutes.
Boil the eggs for about 7 minutes. Bring 800 ml water to the boil, remove from the heat, add 200 ml cold water. Stir in puree flakes.
Wash the chives and cut into small rolls. Stir the capers into the sauce, season with salt and pepper. Rinse and peel the eggs. Stir the puree through. Foam 4 tablespoons butter and breadcrumbs. Serve everything. Cut cress from the bed and sprinkle over it.