Cook potatoes. You can cook them whole and then peel and cut into small pieces, or peel and chop before boiling. Time will need to be adjusted approximately 10 minutes if cooking whole. Add potatoes to a large pot of cold water and bring to a boil. If chopped into 1 inch pieces before boiling, simmer approximately 15-20 minutes, until tender but not mushy when pierced with a fork. Here I cut them into large pieces and cut smaller pieces after cooking.
Drain potatoes and rinse with cold water to stop the cooking process. Set to one side.
Cut the 2 hard boiled eggs into pieces.
In a large bowl, add the sour cream, mayonnaise, mustard, relish, and a little salt and pepper.
Add the potatoes, green onion, peppers, celery, and parsley and gently mix together with a spatula. Add more salt and pepper, mayo, or sour cream to taste.
Store in the refrigerator up to four days.