In a large pot, mix the stock and creamed corn. Bring to a simmer then lower heat to medium heat. Simmer for 5 minutes.
Mix the cornstarch with cold water to make a slurry. Add the rice wine vinegar and the cornstarch slurry to the pot. Simmer for 2-3 minutes, until thickened.
Whisk the eggs in a bowl or measuring cup with a pouring spout.
Stir soup while slowly pouring in the beaten eggs.
Turn the heat off and add the sesame oil.
Serve hot, over rice if desired and garnish with the green onions.
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Notes
To get the most delicate egg ribbons, whisk the eggs well and pour them in very slowly while stirring the soup in a circular motion.Use a glass measuring cup with a pouring spout to pour the eggs in - this can help you achieve very thin wispy egg strands.Make sure to always use cold water in a slurry otherwise, the cornstarch will not mix smoothly and you'll have lumps in your soup.Because this is a simple soup with minimal ingredients, make sure to use a stock with good flavor. It will make a difference.Spice it up! To make this soup a bit spicy add a teaspoon of sriracha hot sauce to your bowl before adding the soup. Stir to mix. Adds a tangy and slightly spicy kick.Optional: To add chicken to this soup, cook 2 sliced chicken breasts in the pot before adding the rest of the ingredients. Carry on with the recipe as written.Use black pepper if you don't have white pepper.