1912: This was the year Richard Hellmann, a German deli owner, started mass marketing his wife’s mayonnaise. It was also the year Life Savers and the Whitman's chocolate sampler were introduced.
A “slumming party” to Chinatown often involved eating Chop Suey, a stew made with meats and a few different vegetables (literally it just means "odds and ends"). Soon people started serving versions of Chop Suey at home, and also coming up with recipes for things like Chop Suey cookies and the aforementioned Chop Suey cake.
John Harvey Kellog marketed the stuff as a health food & parents began to love it as an easy alternative to the lunch-like meals of the past.
Very common for first course would have been a grapefruit, next a soup, then hors d'oeuvres (hot and then cold), anchovies, and somewhere along the line you'd get an eentree...
French food was the obsession , as long as you could have it with a Roman punch (basically an alcoholic slushy).