If you purée anything that it’s not possible to have a whole bug in it. Is that allowed to be used without checking? The Halacha applies to eating a bug in its entirety in its natural form. Is that correct?
Yes, this is correct. However, with regard to foods that actually require checking, it is not permitted to intentionally puree everything to ensure that no whole bugs remain and the bugs are therefore battel. This is known as Bittul Lechatchilah, which is not permitted.
Rather, one must check the food at least on a basic level before making the puree.