Add chicken and cook for 1-2 minutes until browned.
Stir in pumpkin, garlic, fish sauce, and curry powder. Add coconut milk, water, and salt. Bring to boil, then simmer covered for 10 minutes. Uncover and cook for another 10 minutes until sauce thickens.
Stir in lime juice, then optionally dissolve arrowroot in a small amount of sauce and add back to thicken. Garnish with cilantro leaves and serve.
Notes
Serve over rice or with vegetables for a complete meal.