root-to-stem adjective
/ˌruːt.tə.ˈstem/
referring to a trend in cooking that involves using as much of a fruit or vegetable as possible

Root-to-stem cooking is a huge food trend. The concept is simple. The entire part of the fruit or vegetable can, and should be, used. Although stems, leaves or rinds haven’t been used as frequently, they can be used in all types of dishes. More and more recipes are incorporating these lesser used items, which helps to combat food waste.
[www.foodsided.com, 15 November 2017]

dark kitchen noun [C]
UK /dɑːk.ˈkɪtʃ.ᵊn/ US /dɑːrk.ˈkɪtʃ.ᵊn/
a place where food is prepared and cooked that is then delivered to people’s homes by a courier service

But the grimy spot is just a short moped ride from the gleaming office towers of Canary Wharf and upmarket docklands apartments, and is therefore the perfect location for the latest idea from Deliveroo, the food courier service. It is setting up dozens of “dark kitchens” in prefabricated structures for restaurants that want to expand their businesses without opening expensive high street premises.
[The Guardian, 28 October 2017]

menu hacking noun [U]
/ˈmen.juː.ˌhæk.ɪŋ/
in a restaurant, the activity of asking for food or drinks, or combinations of food or drinks, that are not on the menu

At its heart, menu hacking is great for the customer. Whether they build their meal completely from scratch or simply exchange their triple-cooked chips for a healthy salad, the option to adapt the menu helps to ensure great customer service. However it’s important to manage customer expectations. Staff should be knowledgeable about the requests that can and can’t be accommodated.
[www.nisbets.co.uk, 19 March 2017]

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