Partially or completely cooked in advance (adjective)
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Use "pre-cooked" in a sentence
"They usually come in pre-cooked, requiring less prep time than raw meat."
"I invested in some pre-cooked, but fresh, foods like grilled wild Alaskan salmon, spring veggie cous cous, grilled asparagus, a whole roasted chicken (for us and Phoebe -- she's got to eat healthy too!) that came with a free side of cole slaw (yes from Whole Foods)."
"The professional pundits who were parachuted into Egypt by the international media have come with them pre-cooked conclusions about "radical Islam", security threats and what it takes to ensure regional stability."