I made this last night. I was a little confused by the 'simmer ... liquid has evaporated ... 35 mins'. I simmered mine until pretty much all the liquid had evaporated which I think is incorrect as it took over an hour and then was way too thick to blend (in a blendtec). I had to add some water back in.
By liquid has evaporated do you mean all the liquid has evaporated, most of the liquid, some of the liquid? Next time I'll just stop at 35 minutes although this batch will probably last a year.