Cactus Fruits Are Easy to Eat
The cactus fruits are not altogether spineless, but in the improved varieties the spines may easily be removed by brushing with a wisp of grass. The skin is of firm texture and peels off very readily, and you may then bite into the firm flesh as you would into an apple.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 6 Chapter 7