" Time passes, and as the hot midday sun and cool mountain nights alternately bake and freeze the blackened landscape of Vesuvius, something remarkable happens.
Gradually, the streams of cold lava are colonized by a lichen, stereocaulon vesuvianim. This lichen is so tiny that it is almost invisible to the naked eye, but as it grows, it turns the lava from black to silvery gray. Where the lichen has gone, other plants can follow- first mugwort, valerian, and Mediterranean scrub, but later ilex and birch trees, along with dozens of species of apricot.
Meanwhile, the clinkers and ash that covered the landscape like so much grubby gray snow are slowly, inexorably, working their way into the fields and the vineyards, crumbling as they do so, adding their richness to the thick black soil, and an incomparable flavor to tomatoes, zucchini, eggplants, fruit and all the other produce which grows there. "

― Anthony Capella , The Wedding Officer: A Novel of Culinary Seduction