Boil the eggs hard for about 10 minutes. Quench and peel
Clean the chicory, wash it. Cut out the stalk in a wedge shape. Remove leaves and halve if necessary. Clean and wash the rocket and pluck smaller if necessary. Peel onions and cut into rings
Mix vinegar and 2 tablespoons of water. Season with salt, pepper, sugar and horseradish. Whip the oil into the mixture. Halve eggs, arrange on a plate with chicory, rocket and onions. Drizzle the marinade over it and let it stand for about 15 minutes