There has been some grungy stuff on my mushrooms. Who wouldn't wash them? You can't say water is bad for fungus! I would be frightened of cooking unwashed mushrooms.
But yeah, I was going to come in here earlier and say how a teaspoon of solute, no matter what it is, is going to do basically nothing for the boiling point -- but everyone's already gotten to that. Salt to slightly season the pasta or whatever does make sense, and it's not like it hurts. But honestly, I've never seen a difference one way or another. Just stir it occasionally and keep the heat at the right temperature and you'll be making A+ pasta. I always just cook it until it has the right consistency, but some people swear by specific cooking times, and I don't understand why. Different amounts of pasta will cook differently, and even the quality of the pot can affect it.
But pasta + sauce cooking suggestions? There's a million things you can do. Try every conceivable combination of vegetables and fungi, such as onions, shallots, peppers, spinach, asparagus, zucchini, cucumbers, portobellos, etc. Fresh parsley makes so many things better, but you've got to figure the right amount. Personally, the greatest thing you can do is sautee peppers and onions in a creamy vodka sauce with radiatore pasta and a bit of cayenne. I could have that every night.