Detailed Instructions: In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.
Q: Heat a medium-size, heavy saute pan over medium-low heat., Add the oil and the onion and cook, stirring frequently, for 50 to 55 minutes, or until the onion is caramelized., Let cool to room temperature., Combine the caramelized onions, butter, and salt in a food processor and pulse until smooth., Form into a log and refrigerate until firm before slicing and serving
A:
extra-virgin olive oi, yellow onion, butter, kosher salt