Ok, wise MNers: I'm trying to be organised and make part of dinner early, since DS has a doctor's appointment this afternoon and we won't be back until supper time. So I've made the meat sauce for the pasta, but what do I do with it now, knowing I'm going out soon and won't need it for another 4 hours? I don't really want to give my entire family salmonella, so do I let it cool down slowly on the hob, or put it away in the fridge?