Don’t forget to reserve the pasta water! Regular water does not provide the same benefits—it’s starchy and helps create a creamy texture. Purchase pre-sliced mushrooms for less prep time. Avoid canned mushrooms. Spaghetti or other long noodles are best. You can swap Parmesan for Pecorino. Leftovers stay fresh in fridge for 3 days or freezer for 2 months.