Longman Dictionary of Contemporary English
ready meal
noun
EXAMPLES FROM CORPUS
▪ You can dish up lavish meals without doing anything more than popping a ready meal in the microwave.
Wiktionary
ready meal
n. A prepackaged, fresh or frozen meal that only requires heating (often in a microwave) before being served, sometimes in its own packaging.
Usage examples of "ready meal".
Unfortunately, he still had work to go to, but it was a lot easier to get through the days when there was something else beyond them other than the slow drive home, a microwave ready meal and a couple of hours' mindless telly before bed.
Comes home from school, sticks a ready meal in the microwave then she's lost in cyberspace.