Where does “キャセロール” come from?

キャセロール (Japanese) comes from French casserole, from Middle French casserolle, from Medieval Latin cattia — pan.

キャセロール (Japanese): casserole

Definitions

Step	Language	Word	Meaning
1	French	casserole	saucepan; stewpot, cooking pot
2	Middle French	casserolle	—
3	Medieval Latin	cattia	pan

キャセロール — Etymology, Origin & Word History | Etymology Explorer