Hard boil eggs. Rinse with cold water, peel and let them cool down. Then cut into slices with an egg slicer. Wash and halve the tomatoes. Remove the seeds with a spoon.
Cut the tomatoes into small cubes. Wash and cut the cress. Carefully mix cress, tomato cubes and egg slices and arrange on four plates. Mix vinegar with salt, pepper and sugar and add oil.
Serve the marinade separately with the salad.