Ayer cooking kielbasa and sauerkraut in a 300 degree oven for one hour, can I eat it after it was sitting on kitchen counter for five hours
Let's give it the benefit of the doubt &amp; give it an hour to fall into the danger zone. What are you left with?

Kielbasa  - Pre-cooked, smoked sausage, in itself will stay good for weeks.

Sauerkraut - if it's fresh not pasteurised, again it will stay good for weeks.

So, we've disturbed both by cutting, spooning, stirring &amp; then heating. You wouldn't expect them to now be good for weeks, not even days - but 4 hours?

I'd go right out on a limb &amp; say, whatever the 'golden rules' say, if the lid was on &amp; the room wasn't at 25°C or warmer, it will be absolutely fine.

 I'll brace myself for the downvotes ;)