Hi Dan
The configuration for this context menu seems all right. Please make sure the page containing this configured qListView web part starts the page url with those parameters. After all, the web part is going to retrieve those parameters from the page url query string and add them to the GoToUrl specified url as query string parameters. For example, the page url should be something like http://mysite/start.aspx?ID=2&Resturant=Pizza to start with.
The reason ID is automatically append is by design. The list item selected by the context menu is used to append its id. If your list item displays the Resturant column, you may consider using different Source such as ListItem.