I have looked but not found a plugin to help with the formatting of a restaurant menu. Ideally something that would allow the content to be stored in the database and then applied to a template for formatting.
Fields such as: Group, Name, img URL, Description, Size/Price 1, Size/Price 2, Size/Price 3, and icons. The icons could consist of user loaded features like Vegan, Vegetarian, Gluten Free, Spicy, ect.
This would allow it to be displayed in the mobile and standard themes.