Boil 3 cups chicken broth. Thicken 1 more cup broth with 3 Tbsp. cornstarch and whisk mixture into boiling broth. Add 1 lb. thawed, frozen chopped vegetables; simmer for 4 minutes. Whisk 3 eggs and 1 1/2 Tbsp. cornstarch; drizzle into broth so egg cooks in strands. Serves 4.