My "goto" for things like this that just have to be heated up is GFS.
They also stock a couple of local eateries. The markup for reheated processed food is amazing.
A local "upscale" chain *cough* *cough* I once asked the waitress if there was anything in the kitchen that did not come pre-cooked from GFS. After going through the menu in a loud voice, mentioning GFS prices per serving several tables changed their orders or walked out. (bayshore mall, second floor).