Add the Garlic, Butter, and Thyme. Once the butter is nice and melted, add the White Wine. Bring to a boil. Cover pan most of the way with lid, leaving a space open for steam. Lower heat to Low and simmer for about 15 minutes. Once leeks are fork tender, remove the lid. Reduce sauce for another few minutes. Serve and top with Chopped Parsley and Parmesan.