We have not been able to verify President Kennedy's favorite breakfast, but he was known to prefer orange juice, poached eggs on toast, crisp broiled bacon, marmalade, milk and coffee.
President Kennedy was particularly fond of soup--New England Fish Chowder was a favorite. He has been described as a "soup, sandwich and fruit" man for lunch--always soup though.
Though we cannot verify particular favorites, President Kennedy did like lamb chops, steak, baked chicken, turkey (white meat) and mashed potatoes. He also was fond of seafood and baked beans. According to chefs who worked in the White House, President Kennedy liked corn muffins too---as did Calvin Coolidge. For dessert, if he had it, it would likely be chocolate. President Kennedy was a small eater and he often had to be reminded that it was dinner time.