Cleaning and washing vegetables. Cut leek into fine strips, paprika into small cubes. Rinse the corn and let it drain. Skin sausage and cut into thin sticks
Mix vinegar, mustard, salt and sugar, fold in oil. Season to taste with cayenne pepper. Mix vegetables, sausage and mustard marinade. Cover and leave to stand for 5-6 hours (preferably overnight). Season the salad again. Garnish with parsley