Butternut Squash custard and failed sous vide-y pork tenderloin

I'm not sure what to call this other than a custard, but in any case it is great with pork tenderloin. Simply roast an entire butternut squash in a 350 degree oven for about an hour and a half. Scoop out the flesh, and mix with two eggs, grated cheese, salt, pepper and mascarpone cheese (or, full fat greek yogurt). Pour into a pan, preferably a springform, and bake for about 45 minutes at 350 degrees. Let cool a little (I ate it warm) and cut into pie slices before topping with grated ricotta salatta.

I wrapped the pork tenderloin into a tight sausage in plastic wrap, and tried to poach gently in the plastic, as set forth in the Alinea cookbook. I loved the result of wrapping the pork in the plastic in terms of getting a manageable shape out of a difficult cut to cook evenly, but the poaching didn't work especially. Instead, I pan roasted in butter, basting with butter constantly. It tasted great.