Nice plugin. Just noticed a couple PHP notices though, both of which look like fairly straighforward fixes.
Notice: Undefined variable: m in /path/to/wp/wp-content/plugins/easy-restaurant-menu-manager/views/view.items.php on line 54This one pops up when looking at the front-end view of a menu.
Notice: Undefined index: save_options in /path/to/wp/wp-content/plugins/easy-restaurant-menu-manager/admin/functions.php on line 190This one shows up in the admin on the global settings page.
Let me know if you'd like any more details.