The Royal Tombs of Petra, a historical and archaeological city in southern Jordan, do not have a food history per se, as they are primarily known for their monumental grave sites rather than culinary contributions. However, the ancient Nabateans who built Petra were a nomadic Arab people who relied on trade and agriculture. They would have eaten a diet consisting of the ingredients available in the desert environment, such as olives, dates, grains, and legumes. Additionally, trade would bring in spices and other foodstuffs, enriching their cuisine and influencing food culture in the region.
Please note that while vegetarian options are commonly available, vegan options may be more limited and it's advisable to inquire about ingredients as dairy is often used in Arab cuisine.