This was my mom's version of potato salad. She never mixed the ingredients together, she layered them. Serve this in a clear glass bowl. Use a casserole dish, if you want just one layer of salad. I'm so glad I found this recipe in my collection - it's been "lost" for 20yrs-- lol! . Feel free to adjust the amount of egg & green onion to your taste. NOTE: Prep time does not include chilling time.