Navigate to the Pages and create a new page named "Contact" or whatever you want to call it. Contact page uses Default Template from the Page Attributes.
You are free to use any other contact form plugin like Contact Form 7: https://wordpress.org/plugins/contact-form-7/ instead of Jetpack.
Before you start with setting up your menus, you need to install Food and Drink Menu plugin: https://themeofthecrop.com/plugins/food-and-drink-menu/.
Veggie supports and is visually styled to fit the plugin. More about setting up your menus and using this plugin, please read here: http://doc.themeofthecrop.com/plugins/food-and-drink-menu/
10.3 Restaurant Reservation
Before you start with setting up your reservation page, you need to install Restaurant Reservation plugin: https://themeofthecrop.com/plugins/restaurant-reservations/.
Veggie supports and is visually styled to fit the plugin. More about setting up your reservations and using this plugin, please read here: http://doc.themeofthecrop.com/plugins/restaurant-reservations/