A good cook can be defined by how they approach new dishes. When we're first learning to cook,we keep adding ingredients - an extra spice,seasoning or flavour - in an attempt to make our meal taste better. But when we actually become a good cook,we start taking ingredients away,removing anything unnecessary or distracting,until a dish finally tastes simple,clean and elegant. Finely grated dried shiitake adds a big umami boost to this simple pasta.