Consider the following sentence:
As suggested is your best option.
In case the sentence is difficult to understand, consider a context as follows:
Although further opportunities may arise later, I think, for now, as suggested is your best option.
The structure seems natural, at least to me, even if uncommon, but also poses a question I find challenging.
If the sentence is accepted, then it seems to follow that the phrase "as suggested" functions as a noun. Is this inference correct?
If so, which rule or principle of grammar directly would support this function? Otherwise, how does the phrase integrate successfully with the overall structure of the sentence?