The 33-year-old royal — who has been dating 'Suits' actress Meghan Markle since mid-2016 — revealed his eating habits to nine-year-old Marni Ahmed at the annual WellChild Awards in London.
During his conversation with the flame-haired Prince, Marni — who suffers from a rare skin condition — asked him what he had for breakfast following a dare by WellChild ambassador Gaby Roslin.
Recalling their tongue-in-cheek chat, Marni shared: "He said, 'bacon and sausage sandwich.'"
Marni also asked the royal whether he'd ever eaten a Doner kebab, and according to the Daily Star newspaper, Prince Harry responded: "No, but my friends have."
Meanwhile, it was recently reported that Meghan is set to quit 'Suits' and marry the British royal.
The 36-year-old actress plays paralegal Rachel Zane in the US drama series, but she is said to have told show bosses she will not be heading back to the office for next year's eighth series.
A source recently said: "Meghan knows she can't really act at the same time as being a princess and is happy to make this career sacrifice."
Speculation has claimed that the American actress and Harry will announce their rumoured engagement before Christmas.
And if Meghan does become a full-time royal, the raven-haired beauty - who has been a global ambassador for international charity World Vision since 2006 - is said to be keen to pursue further charitable work.
The insider added: "She really enjoys her charity work with Unicef and will broaden out her charity commitments when she becomes a full-time royal."