Groves of ash trees used to cover thousands of hectares across northwestern Sicily. This wealth of trees has now been reduced to just 250 hectares in the municipalities of Pollina and Castelbuono, of which just 20 to 30% are still productive. During the summer, harvesters cut the bark of the trunks and a resinous, pale blue substance oozes out. Exposed to the hot sun, it forms white stalactites of manna. This is then collected using a “mannaruolu” to cut the manna, a “rasula” to scrape out the manna that has remained in the furrows of the bark, and a large prickly pear leaf, used to collect the part that has dripped on the ground.