It is important that you let the salad stand in the refrigerator for at least an hour or so, otherwise, it will not taste right as the onions are the only thing that flavors the dressing.
Grandma always made it with Miracle Whip, but if you are one of those folks who despises the taste, you can substitute mayonnaise with 1-2 tablespoons of sugar added. You can also, add in 2 Tbsps Hormel real bacon bits for extra flavor.
Mix all. Let stand for a minimum of two hours in the refrigerator.