Canonical version
The Master
The Master . . . ate little food. He was known to begin His day with tea, goat’s milk cheese and wheat bread. And at the evening meal a cup of milk and a piece of bread might suffice. He considered the latter a healthy meal. Had not Bahá’u’lláh, while at Sullaymaniyyih, subsisted mostly on milk? (Sometimes Bahá’u’lláh ate rice and milk cooked together.) ‘Abdu’l-Bahá’s sparse diet also included herbs and olives it rarely included meat.
Source: Honnold, Annamarie, Vignettes from the Life of ‘Abdu’l-Bahá
Collected from bahaistories.com (Subject: diet).