In many Indian recipes I see the phrase "cook until the oil leaves the side of the pan". For example, this recipe says:
Add tomato puree and cook until oil leaves the side.
Similarly, this one says:
[C]ook the gravy until the oil leaves the sides of the pan.
Is this the same as "cook until the oil separates" as described in this other question? Or is it something different? Since the other question talks about the oil leaving the curry/gravy rather than the "sides of the pan", they seem to be different phenomena. Thanks for your help!