From Groq:

According to the Food and Agriculture Organization (FAO) of the United Nations, the most widely consumed vegetable in the world is the potato. In 2020, global potato production reached 380 million metric tons, accounting for about 28% of the world's total vegetable production.

Here is the ranking of the most popular vegetables in the world...

1. Potato: 380 million metric tons (28% of total vegetable production)
2. Tomato: 193 million metric tons (14% of total vegetable production)
3. Onion: 143 million metric tons (10% of total vegetable production)
4. Cabbage: 134 million metric tons (9% of total vegetable production)
5. Carrot: 123 million metric tons (8% of total vegetable production)

For example, in some parts of Asia, leafy greens like bok choy and Chinese broccoli are more popular, while in Europe, root vegetables like beetroot and parsnip are more widely consumed.