In a large pot or Dutch oven, heat about 1 tablespoon of vegetable oil over medium-high heat. Add the ground chicken and cook until browned and cooked through, breaking it apart, about 6 minutes. Add the grated ginger and minced garlic, and cook until fragrant for another 2 minutes, stirring.
Add 4 to 5 cups of chicken broth, and deglaze the pot by scraping the brown bits from the bottom of the pan (use a wooden spoon to prevent scratching the pot). Then, stir in the corn kernels. Bring to a boil, then reduce heat to simmer for about 10 minutes.
Dissolve the 3 tablespoons of cornstarch with 4 tablespoons of cold or room temp water, and add it to the soup. It will thicken as it simmers. Simmer for 5 minutes. Note: If too thick, add more broth until desired consistency.
Increase to medium heat. Add the lightly beaten eggs and stir to swirl, until eggs are cooked, about 1-2 minutes. Season with more salt and pepper if needed.
Add a small drizzle of sesame oil to taste. Garnish with sliced green onions. Enjoy!