I cooked a beef roast in crock pot and refrigerated it the same night. But the next day took it out and used some of it and forgot to put the rest back in refrigerator. Stayed out all night probably about 12 hours before I noticed it. I put it back in refrigerator. Should I throw it away?
you have three options.
Both 2 and 3 are going to reduce the quality and taste, and only partially deal with the bacterium.
Personally it'd be in the compost
seriously just use your senses. it depends on how warm an area you live for anything much to have gone on. i leave food out all the time, carelessness, whatever. smell it, put a little on your tongue, judge from that. when in doubt reheat on a high flame for a short period or mixed it back in with say fresh vegetables you're making, the tastes will simply blend. but trust your senses. if it's gone off, it's pretty noticeable. raw meat would have been a different thing altogether, but cooked it's not nearly as prone to going off. live a little. it's like with expiration dates, they're stated on the safe side, for the company's safety, you still have to check food yourself, otherwise you'd being throwing food away all the time. now that's bad. taste it. that's what your senses were meant for. your smell and taste are pretty potent.