Stir together the coconut milk, curry paste, and ginger in a medium pot. Cook over medium heat, stirring constantly, for about 1 minute, or until it starts to warm up and steam. Add the broth, black pepper, and salt.
Bring the mixture to a simmer over medium heat. Add the dumplings and gai lan. Return the soup to a simmer. Simmer, stirring occasionally, for about 5 minutes, or until the soup dumplings are soft and cooked through.
Place the cooked noodles in a bowl. Top with the soup mixture and scallion. Garnish with chili oil.
