Using an egg-slicer on Shabbos

Hi,

Sources prohibit use of mechanical blades on Shabbat to chop up food that comes from the ground, due to the prohibition against grinding. However, this will not apply to an egg slicer, because these blades only slice. Also, one may argue that the egg is not part of the class of foods that "grow from the ground."

(Rivivot Ephraim 1:248)

Have a great day,
Mordechai