I bought 8 stuffed cabbage on Thursday and froze them. They are partially defrosted for today, Sunday. How long do I cook them and what temp?

Use the microwave on the sensor setting. That will do it just fine

You can also put them in a dish (just big enough) with a little tomato sauce underneath and on top and bake, covered, until hot. Maybe 350 F for 20-30 mins. If you happen to like a little freshly grated Parmesan cheese on top (though perhaps not traditional) remove foil the last 10 mins. I believe I've only tasted Halinka's stuffed cabbage once. They weren't my favorite. I think they may have added some nutmeg or the like. I'm not a nutmeg fan.

I usually microwave already cooked meals low and slow. Maybe do in 2 minute stints on power 7. Keep checking until your optimal temperature