Reduce the heat to medium-low and add the garlic, green curry paste, ginger and lemongrass. Cook for another 1-2 minutes, stirring frequently, until nice and fragrant.
Taste the soup and add more salt, if needed. If you'd like the soup to be a little thinner, add more chicken broth and then stir well to combine.
See Café Tips above in the post for more detailed instructions and tips as well as how to transform this soup into a complete meal.