Heat coconut oil in a dutch oven. Add the bell peppers and cook for about 7 minutes until softened slightly. Add onions and let cook for an additional 5 minutes.
In a separate pan, cook the chicken until slightly golden brown and thoroughly cooked.
Add chicken to the dutch oven with the onions and peppers, along with the grated ginger.
Let the ginger cook for 1-2 minutes, or until fragrant.
Add the red curry paste and mix until everything is coated and there are no longer chunks of curry paste. Let cook for 1-2 minutes.
Add the coconut milk, fish sauce, brown sugar and juice from half a lime. Bring to a simmer and then cover. Let simmer for 15 minutes so the flavors meld.
Serve with steamed rice.