using (new SecurityDisabler())
            {
                Database masterDb = Sitecore.Configuration.Factory.GetDatabase("master");
                Item parentItem = masterDb.Items["/sitecore/content/my-website/home"];
                TemplateItem myTemplate = masterDb.GetTemplate(new ID("{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}"));
                parentItem.Add("my test item ", myTemplate);
            }