WHAT EVEN ARE CASSEROLES? WELL, CLICK HERE TO FIND OUT. Posted on 16 August 2015 at 13:03 CASSEROLES: A KIND OF STEW OR SIDE DISH COOKED SLOWLY IN AN OVEN. ORGIN: EARLY 18TH CENTURY: FROM FRENCH, DIMINUTIVE OF CASSE ‘SPOONLIKE CONTAINER,’ BUZZ THIS IF YOU DON'T UNDERSTAND WHAT DIMINUTIVE MEANS. :) -MAMA CASSEROLE