well, you know, that's a coincidence, because i've always thought of the human digestive system as a sort of oven/microwave!
because if you notice, sometimes you will eat a large quantity of food, like beef jerky, and then vomit/burp up this not-yet-fully-digested food (chunks.) the pieces will still be fully intact, but covered with a warm slime.
not only is the slime warm, but the food chunk itself is warm! therefore, your stomach = mini oven. granted, you can only get your food lukewarm, but some people can't handle steaming hot foods, (*cough* toby *cough*) and love lukewarm food.
i've always wondered that if you swallow, say a chicken, whole, then regurgitate it, will it come up all cooked? (ignore the salmonella.)
would you FEED it to people? (people who like lukewarm foods, of course.)