Put on leather work gloves before harvesting cactus pads.
Locate ideal cactus pads for harvest. Look for those with glossy skin, immature spines and a thickness of no greater than 1/2 inch. Avoid dark or dull green pads or those with obvious signs of trauma or illness.
Hold the cactus pad steady. Sever it just above the point where it connects to the pad below it using a knife or large bypass shears. Lay the gathered cactus pads flat on a large tray or baking sheet.
Place two or three cactus pads in a colander. Set the colander in the sink. Run cool water over the cactus pads while gently rubbing them with a nylon pot scrubber to remove the soft, immature spines. Work in batches until all the cactus pads are free from spines.
Slice and cook the cactus pads immediately or dry them for long-term storage.