MRS. CROWEN'S AMERICAN LADY'S COOKERY BOOK, (...) BY MRS. T. J. CROWEN. NEW YORK: DICK & FITZGERALD, PUBLISHERS 1866 Pg. 168: SPANISH OMELET.--Make with chopped ham as above directed, add to it two small white oinions (sic) finely minced, and finish as directed. (M-W and OED both have 1886. A "Dutch Omelet" follows--ed.)