Entirely possible, since the Numenoreans were described as educating the men of Middle-earth in the planting of 'corn', which under the usage of Tolkien's day referred to 'pretty much any grain crop used for human consumption really, except that dreadful stuff on cobs, that's maize and only pigs, Americans and Portuguese willingly eat it'. So we have no real way of knowing whether even the Numenoreans had wheat as we know it, let alone the Elves.

But King Arthur bread flour (13-14% protein by weight) will do in a trice when you haven't got semolina (14%) or elven-grain, I think.