This is an icon for an onion. The onion has layers and layers that is revealed. There appears to be five layers on the onion and on the outside of the onion there appears to be the root of the onion.
This is the Onion icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.