WooCommerce lets you sell all kinds of physical and digital products online, including food items. We have already covered a bunch of restaurant themes for WooCommerce powered sites. Food Online is also worth a look. It is a plugin that adds a food ordering system to your site.
This plugin is compatible with WooCommerce Product Add-ons. It lets you offer all kinds of dishes with a wide variety of options. Food Online has a clean design and works well on desktop and mobile devices. You can choose 1/2 column menu layouts.
This is a free WooCommerce extension. You can find out more about it here.