In a large pan, cook onion, garlic and curry in the butter for a few minutes until onion is tender. Add pumpkin, nutmeg, Lagrima White Port, and bay leaf. Stir in the broth and bring to a boil. Reduce heat and simmer uncovered for about 15 minutes. Take out the bay leaf. Stir in ¾ cups of the half & half and cook over low heat for a few minutes.
In a small bowl, stir the remaining half & half with the cornstarch until dissolved, then add to pan. Cook and stir until thickened. Reduce heat to minimize boiling for a couple of minutes.
Serve:
Serve and garnish with cream swirled on top, and sprinkle with chives. May be served in small, hollowed-out pumpkins for added festive look.