A cook prepares food during the annual Open Kitchen event in Ljubljana, Slovenia, Sept. 11, 2020. Prevention measures against COVID-19 are required at the event this year. (Xinhua/Peng Lijun)

A cook prepares food during the annual Open Kitchen event in Ljubljana, Slovenia, Sept. 11, 2020. Prevention measures against COVID-19 are required at the event this year. (Xinhua/Peng Lijun)

A cook sells food during the annual Open Kitchen event in Ljubljana, Slovenia, Sept. 11, 2020. Prevention measures against COVID-19 are required at the event this year. (Xinhua/Peng Lijun)

A cook prepares food during the annual Open Kitchen event in Ljubljana, Slovenia, Sept. 11, 2020. Prevention measures against COVID-19 are required at the event this year. (Xinhua/Peng Lijun)

A cook prepares food during the annual Open Kitchen event in Ljubljana, Slovenia, Sept. 11, 2020. Prevention measures against COVID-19 are required at the event this year. (Xinhua/Peng Lijun)

People enjoy food at the annual Open Kitchen event in Ljubljana, Slovenia, Sept. 11, 2020. Prevention measures against COVID-19 are required at the event this year. (Xinhua/Peng Lijun)

People buy wine during the annual Open Kitchen event in Ljubljana, Slovenia, Sept. 11, 2020. Prevention measures against COVID-19 are required at the event this year. (Xinhua/Peng Lijun)