Cut the squash in half. Rub it with half the oil and the salt and pepper.
Place on baking sheet and roast until flesh is soft and brown, about 25 minutes.
While squash is roasting, heat the remaining oil in large pan over medium heat. add the chicken, bell pepper and onion. Sauté for 3 minutes then add the curry powder, milk and raisins. Mix thoroughly. Simmer over low heat for 10 minutes.
Serve a scoop of the chicken curry inside the roasted squash, garnish with cilantro.