Hello! I'm going to be cooking a pork butt roast in the oven but I have no idea how long to cook it. I've been to so many websites but they are all different with people in the comments saying X temperature is unnecessary etc.. so I thought I'd come here! It's a 10 pound pork butt roast, oven bag optional. I'd like it to be fall apart tender. Going to add goodies like onion/carrot/potato later on. No idea which is the best way to cook it Any ideas?