Peel the grapefruit so that the white skin is completely removed. Cut out fillets along the inner thin skins. Squeeze 4 tablespoons of juice from the remaining fruit. Chop or chop the hazelnuts. Cut artichoke hearts into slices.
Wash salad leaves and pluck into bite-sized pieces. For the marinade, mix grapefruit juice, vinegar and oil. Season with salt, pepper and sugar. Arrange the prepared ingredients carefully mixed with the marinade on plates