He's joking.

In reality:

"Many kinds of vegetables were cultivated and consumed.[19] These included celery, garlic, yellow squash, cabbage and other brassicas (such as kale and broccoli), lettuce, endive, onion, leek, asparagus, radishes, turnips, parsnips, carrots, beets, green peas, chard, chicory, green beans, cardoons, olives, and cucumber. Legumes were limited to dried peas, sweet peas, lupines, lentils and fava beans.

Popular fruits included apples, pears, figs, grapes, quinces, citron, blackberries, currants, damson plums, dates, melons, rose hips and pomegranates.[13] Less common fruits were the more exotic azeroles and medlars. Cherries and apricots, both introduced in the 1st century BC, were popular. Peaches were introduced in the 1st century AD from Persia. Oranges and lemons were known but used more for medicinal purposes than in cookery.[13] Although known to the ancient Romans, lemons were not cultivated in Italy until the Principate.[13][17] At least 35 cultivars of pear were grown in Rome, along with three types of apples. Cato described pear culture methods similar to modern techniques.[18] There are recipes for pear and peach creams and milk puddings flavored with honey, pepper and a little garum."