Narrative:

While level at cruise flight, I left my seat to go to the lavatory. When returning to the cockpit, I noticed the galley curtains were drawn and the flight attendant had the oven doors open and the ovens on because she was cold. After thinking about this, I questioned several other flight attendants about this practice and found out that this is done often. I doubt the engineers had this use in mind when designing the ovens and thought it should be reported. Also, if this is being done at this airline, I would guess that it is done at others and should probably be brought to in-flight's attention.

Google
 

Original NASA ASRS Text

Title: A B737 CAPT NOTICES THAT THE CABIN ATTENDANTS ARE USING THE GALLEY STOVES TO WARM THEMSELVES UP IN THE GALLEY AREA.

Narrative: WHILE LEVEL AT CRUISE FLT, I LEFT MY SEAT TO GO TO THE LAVATORY. WHEN RETURNING TO THE COCKPIT, I NOTICED THE GALLEY CURTAINS WERE DRAWN AND THE FLT ATTENDANT HAD THE OVEN DOORS OPEN AND THE OVENS ON BECAUSE SHE WAS COLD. AFTER THINKING ABOUT THIS, I QUESTIONED SEVERAL OTHER FLT ATTENDANTS ABOUT THIS PRACTICE AND FOUND OUT THAT THIS IS DONE OFTEN. I DOUBT THE ENGINEERS HAD THIS USE IN MIND WHEN DESIGNING THE OVENS AND THOUGHT IT SHOULD BE RPTED. ALSO, IF THIS IS BEING DONE AT THIS AIRLINE, I WOULD GUESS THAT IT IS DONE AT OTHERS AND SHOULD PROBABLY BE BROUGHT TO INFLT'S ATTN.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.