I took note of PanNans review, and was also a bit wary of the puree, so I chose to use canned chopped tomatoes instead, giving me much more of a saucy consistency. I added the garlic with the tomatoes. This really was very pleasant, I wouldn't normally add potatoes to pasta but in fact it was very good. I did add the splash of wine. Overall, a good recipe, which we enjoyed. Made for Spring PAC 2012, thank you, Deux Petits Chef!
My husband enjoyed the recipe very much. I followed the recipe exactly, except I used fresh rosemary and parsley instead of dried. I did not see in the directions where to add the garlic, so I added it with the potatoes. For my taste, the sauce was too starchy/pasty, and I would cut the amount of olive oil in half. The puree is pretty thick already, and when combined with starchy vegetables like potato and carrot, and with only a splash of wine for liquid, the result was very heavy.