Most ships serve meals buffet-style, with breakfast, lunch, and dinner included on a full-board basis. The spread typically mixes familiar international dishes with Egyptian staples — koshari, ful medames, grilled meats, fresh flatbread, and a range of salads and mezze.
Dietary needs
Vegetarian, vegan, and specific allergy needs can usually be accommodated with advance notice, since a buffet naturally allows some flexibility — see Is Egypt Suitable for Travelers With Dietary Restrictions? for more on how this works in practice. It's worth flagging anything important before you sail rather than assuming on arrival.
Drinks
Bottled water and soft drinks are commonly included; alcohol is often a separate purchase, and policy varies by ship — see Is Alcohol Available on a Nile Cruise? for what to expect.