Purple sweet potato for sale at the Parap Market, Darwin, NT

Purple sweet potato for sale at the Parap Market, Darwin, NT in March 2019

Hot chips and tomato sauce at a pub at Darling Harbour, Sydney

Hot chips and tomato sauce at a pub at Darling Harbour, Sydney in September 2017

A potato and cauliflower salad in Fitzroy, Melbourne

A potato and cauliflower salad in Fitzroy, Melbourne in January 2018

Sign in the food court in the Terminal 21 shopping centre in Korat, Thailand. Butcher's choice, sensational 1/2 meter delicious bratwurst with sauerkraut and buttered potatoes, 197 baht

Sign in the food court in the Terminal 21 shopping centre in Korat, Thailand in August 2017. Butcher's choice, sensational 1/2 meter delicious bratwurst with sauerkraut and buttered potatoes, 197 baht

Roast vegetables for dinner in Fitzroy, Melbourne

Roast vegetables for dinner in Fitzroy, Melbourne in March 2016

Baked sweet potato sign outside a restaurant in a shopping arcade in Nara, Japan

Baked sweet potato sign outside a restaurant in a shopping arcade in Nara, Japan in March 2015

Hotel breakfast in Randburg, Johannesburg, South Africa

Hotel breakfast in Randburg, Johannesburg, South Africa in February 2015

Restaurant sign promoting Malay curry spud in Canberra

Restaurant sign promoting Malay curry spud in Canberra in May 2016

Hawker with vegetables in Hanoi, Vietnam

Hawker with vegetables in Hanoi, Vietnam in January 2012

Sweet potato cakebar for sale in a shop in Kagoshima, Japan

Sweet potato cakebar for sale in a shop in Kagoshima, Japan in March 2015

Sweet potatoes frying in a wok in Kuching, Sarawak, Malaysia

Sweet potatoes frying in a wok in Kuching, Sarawak, Malaysia in January 2012

Steak with Paris mash

Paris mash and steak for dinner in Canberra in September 2013

Sunday roast

Poster advertising the best roast on the coast, taken in Milton, NSW in August 2011

Selling potatoes

Potatoes for sale on Mactan Island, Philippines, in March 2009

Potatoes anyone?

Cutting up potatoes for dinner at the Dera Radha Soami Colony in Beas, Punjab, India in December 1989. These photos give some idea of how many people are fed there each meal. It is a truly impressive operation.