Preparation In a blender or food processor blend the sugar, the salt, the mustard, and the vinegar until the mixture is smooth. With the motor running add the oil in a stream and blend the dressing until it is emulsified. Add the onion and the reserved papaya seeds and blend the dressing until the papaya seeds are the consistency of ground pepper. The dressing keeps, covered and chilled, for 2 weeks.
Preparation In a blender or food processor blend the sugar, the salt, the mustard, and the vinegar until the mixture is smooth. With the motor running add the oil in a stream and blend the dressing until it is emulsified. Add the onion and the reserved papaya seeds and blend the dressing until the papaya seeds are the consistency of ground pepper. The dressing keeps, covered and chilled, for 2 weeks.