When this post was written, I'd agree that Easy Restaurant Menu Manager was the best plugin available for the purpose. But it leaves much to be desired in the free version, plasters upgrade prompts everywhere, and doesn't appear to be very well supported.

Both myself and Noumaan (above) recognized the deficiency and have since published restaurant menu plugins. Justin (above) also appears to be working on a solution to the issue.

For now, I'd recommend one of our plugins, both of which have received good ratings and reviews:

http://wordpress.org/plugins/food-and-drink-menu/

http://wordpress.org/plugins/restaurant-menu-manager/

No doubt Justin's entry to the field will be a welcome addition as well.