Turn the stove to low heat. Slowly drizzle the cornstarch slurry into the soup. The broth will thicken.
Now, add the eggs by slowly pouring the eggs with one hand and stirring with chopsticks or a fork.
Season the soup with salt and pepper. Taste it. Add the green onions.
Notes
Make sure the broth is simmering when you pour in the eggs.
Pour the eggs slowly and thinly with a measuring cup with small spout. This will ensure the eggs do not form into big clumps.
Use a spoon, fork, or chopsticks to stir the soup while pouring the eggs. This will distribute the eggs evenly throughout the soup and create beautiful strands.