For the vinaigrette, clean and wash the radishes, put 2 radishes aside for garnishing. Roughly grate the rest. Mix together with the chives, vinegar and 2 tablespoons of water. Season with salt, pepper and sugar.
Add oil. Wash the lettuce leaves, drain and arrange on a plate. Place sliced camembert on top. Pour the vinaigrette over it. Garnish with radishes. Serve with rye toast.