I decided to try my hand at the 72 hour short rib sous vide cook. I cooked mine at 143 degrees and they came out spectacular. I served them up with some Pomme Puree. I will admit I now see why you want to use a sieve. I tried using my potato ricer but they ended up very runny and "course". After a few minutes with my stick blender I ended up with a much smoother product and it thickened some but still a little loose. All in all though it turned out great and is definitely going in "the book".