Whisk pumpkin - garlic powder in a large saucepan.

Bring to a boil over medium-high heat.

Reduce heat to medium-low to low; simmer 10 minutes.

Stir in fish sauce, sugar, salt and pepper.

Meanwhile, cook rice noodles; drain.

To serve, ladle soup into bowls, mound noodles in center.

Top with chicken; sprinkle with cilantro.