As an aside and an update to the last entry about the Titanic, some people who saw it were wondering what the other people on the ship were eating. The 2nd Class Dinner Menu for April 14, 1912 lists :

Consummé
Tapioca
Baked Haddock
Sharp Sauce
Curried Chicken & Rice
Spring Lamb, Mint Sauce
Roast Turkey, Cranberry Sauce
Green Peas
Purée Turnips
Boiled Rice

Boiled & Roast Potatoes
Plum Pudding
Wine Jelly
Cocoanut Sandwich (sic)
American Ice Cream
Nuts Assorted
Cheese
Biscuits
Coffee

Aside from the coconut sandwich, nothing is particularly unusual or foreign from food most of us would still eat today.

As for the 3rd class passengers, they apparently didn’t have a separate menu for all of their meals. A surviving copy indicates they were offered:

Breakfast: Oatmeal, porridge and milk, smoked herrings, jacket potatoes, ham and eggs, fresh bread & butter, marmalade, Swedish bread, tea and coffee.

(Jacket Potatoes is another name for normal baked potatoes. Fannie Farmer said, in 1918, that Swedish bread was a kind of yeast risen coffee cake, shaped into a braid or a ring, and flavored with almonds.)

Dinner: Rice soup, fresh bread, cabin biscuits, roast beef and brown gravy, sweet corn, boiled potatoes, plum pudding, sweet sauce and fruit.

Tea: Cold meat, cheese and pickles, fresh bread and butter, stewed figs and rice, and tea.

Supper: Gruel, cabin biscuits and cheese.

(Gruel is a hot, wet mixture of some type of cereal, wheat or rye flour, and also rice, boiled in water or milk, similar to oatmeal. According to Technology of Biscuits, Crackers and Cookies, Second Edition, by Duncan Manley, (2000), cabin biscuits are thin butter cookies, usually flavored with vanilla, but not a lot of sugar. )

You may also be interested in reading about what the first class passengers on the Titanic were eating.