The area around Humayun's Tomb, a UNESCO World Heritage Site situated in Delhi, doesn't have its own distinct food history but inherits the rich culinary heritage of the capital city of India. Delhi itself has been a melting pot of various cultures and cuisines, given its history of being ruled by different dynasties like the Mughals who left a significant imprint on its food. Delhi's cuisine has evolved over centuries incorporating flavors from across the country and from the traditions of its diverse immigrant population.
Do note that while the restaurants mentioned are not exactly located at Humayun's Tomb, they are relatively close and form part of the larger food culture that visitors to Delhi usually experience. Humayun's Tomb itself does not host eateries, but its surrounding neighborhood in Delhi is brimming with dining options that showcase the city's rich gastronomic diversity.