Bring a pot of salted water to a boil. Then add potatoes and cook until tender but still firm to the touch, about 5-10 minutes. Drain water.
Chop eggs, then add them and the peas and carrots to the potatoes.
In a medium bowl combine the chopped onions, mayonnaise, sour cream, Heinz dressing, relish, Cajun spice, mustard, and mayonnaise. Mix well, add to the potato and egg mixture. Adjust for salt and pepper.Refrigerate until ready to eat.
Notes
Please keep in mind that the nutritional information is a rough estimate and can vary significantly based on the products used in the recipe.