Place a large pot on medium heat. Allow to heat up.
Add oil and leave for 1 to 2 minutes.
Sprinkle in brown sugar.
Leave sugar to caramelize and become frothy.
Stir occasionally to ensure even heating (about 3 to 5 minutes).
Once sugar darkens (it may smoke too), stir in the ketchup.
Add the seasoned chicken pieces.
Mix to coat the chicken.
Add the pimento and chadon beni.
Lower the heat. Cook for 10 minutes (uncovered).
Once the liquid has mostly boiled off, toss in the onion, garlic, carrot, 1 tbsp of celery and cooked pigeon peas.
Mix and cook for about 5 minutes.
Stir in the washed rice. Cook for about 3 minutes.
Add the coconut milk and water.
Cook on low for 30 minutes. Stir occasionally.
Add butter, chives and remaining celery. Stir.
Cook for another 10 to 15 minutes or until the liquid has boiled off and the rice is cooked.
Serve hot.