Obtain 8 Shadelight Truffles, and plant 8 Shadelight Spores.
I like to bake with truffles... when I can find them. They only grow up on the Skyrange, and in very, very scarce amounts.
They're a fantastic ingredient, but we can't risk over-farming them. That's why we need to replace what we've taken. Bring me a handful of adult truffles, and plant some of these spores in their place.