The Lebanese-flagged bulk carrier Brave Commander leaves the seaport of Pivdennyi with wheat for Ethiopia. File/Reuters
The "Grain from Ukraine" initiative demonstrated global food security was "not just empty words" for Kyiv, he said.
The Kremlin says food exported from Ukraine's Black Sea ports under a UN-brokered plan has not been reaching the most vulnerable countries.
Zelensky said Kyiv had raised $150 million from more than 20 countries and the European Union to export grain to countries including Ethiopia, Sudan, South Sudan, Somalia and Yemen.
"We plan to send at least 60 vessels from Ukrainian ports to countries that most face the threat of famine and drought," Zelensky told the gathering.
Kyiv had raised $150 million to export grain to countries including Ethiopia, South Sudan and Yemen.
The summit was attended in-person by the prime ministers of Belgium, Poland and Lithuania and the president of Hungary. Germany and France's presidents and the head of the European Commission delivered speeches by video.
A joint statement issued after the summit said that since Russia's Feb. 24 invasion of Ukraine, the world had received 10 million tons fewer agricultural products than in the same period in 2021.
"This means that the food security of millions of people around the world is seriously threatened," it said, blaming a Russian blockade of Ukrainian ports earlier in the conflict.
"We are convinced that we will jointly overcome the grave humanitarian and economic consequences of the global food crisis caused by Russia's aggressive war against Ukraine," it said.
The gathering coincided with Ukraine's annual memorial day for Holodomor, the man-made Stalin-era famine that killed millions of Ukrainians in the winter of 1932-33.
In a video address, French President Emmanuel Macron announced a contribution of 6 million euros ($6.24 million) for the transport and distribution by the World Food Programme of Ukrainian grain to Yemen and Sudan.
"The most vulnerable countries must not pay the price of a war they did not want," he said.
President Volodymyr Zelensky denounced Saturday's attack as "barbarism" that showed Moscow could not be trusted to implement a deal struck just one day earlier with Turkish and United Nations mediation.
"The departure of the cargo ship Razoni flying the flag of Sierra Leone and loaded with maize will leave the port of Odesa bound for Lebanon at 08:30 (0530 GMT)," the ministry said in a statement.
The sailing was made possible after Türkiye and the United Nations brokered a grain-and-fertiliser export agreement between Russia and Ukraine last month.
On both sides of the border, residents jolted out of sleep by the pre-dawn quake rushed outside on a cold, rainy and snowy winter night, as buildings were flattened and strong aftershocks continued.
Karnataka Police have arrested a woman from Kerala, who threatened to explode a bomb at the Bengaluru International Airport while arguing with the authorities regarding delay to board the flight, police said on Monday.
Syrian toddler Raghad Ismail was rushed to safety from the rubble of her home after it collapsed in a huge earthquake that has wreaked devastation in Syria and Turkey. But most of her family, including her mother, did not make it out alive.