In a large skillet over medium heat, heat the coconut oil. To the skillet, add the next 5 ingredients (onion through chicken) and cook for 10 minutes, until chicken is brown and vegetables are slightly tender. To the chicken mixture, add the remaining ingredients (pineapple through salt and pepper) and stir.
Reduce heat to low and cover. Simmer for 10 minutes, until chicken is cooked through and pineapple is tender. Serve warm.