I cook 6 to 8 hard boiled eggs in a separate pot, cool and shell them. I start with chicken stock on the stove in a big pot and add my cubed potatoes, thinly sliced celery ( I use my mandalin) and start it cooking. When the potatoes are almost done I add 3-4 chopped green onions. When the potatoes are tender, I take 1/2 cup of milk and add 1-2 tablespoons of cornstarch ( depending on how big a batch)to the milk and wisk together. I stir the milk/ cornstarch into the soup pot and stir. I chop up the eggs and add to the pot just long enough to heat them through and serve the soup.