Big Green EGG Plancha Griddles, Half-Moon & Full RoundHeavy duty, cast iron griddles. Dual flat & ridged sides in round and half moon sizes. Cast Iron Placement: We recommend keeping cast iron close to the fire, where it can easily absorb the heat it needs to blacken or sear. Using cast iron near the felt line is possible, but you'll need to have a much hotter fire to achieve similar results to using it atop the fire ring or even lower on a rack accessory. XL Half Moon can sit directly on the XL fire