Return the chicken to the skillet then add water; put the lid on. When the water starts boiling, turn the heat to low-medium and let simmer for 20 minutes.
Add dried kaffir lime leaves, coconut milk, and mango puree. Let simmer again for 15 minutes or until the chicken is cooked. Season with salt or fish sauce.
Serve with rice. You can garnish with coriander leaves and drizzle with lime juice before enjoying. You can also serve this with chopped red chili or chili flakes.
If using cubed chicken breasts, lessen the cooking time as they tend to cook faster.