This looks like the bottom half of a circle. There are three legs protruding from the bottom of the circle. On top of the circle, there appears to be a controlled fire.
This Grill icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.