My man - https://www.amazon.com/Lodge-Reversible-Griddle-Combo-Double-Sided/dp/B002CMLTXG/ref=asc_df_B002CMLTXG/?tag=hyprod-20&linkCode=df0&hvadid=167141575819&hvpos=&hvnetw=g&hvrand=7177402524483603870&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9031716&hvtargid=pla-138243274155&psc=1

Cast iron griddle, with added benefit of not being flammable.

It not an inset, but this works great for me.

Lodge LDP3 Reversible Grill/Griddle, 9.5-inch x 16.75-inch https://www.amazon.com/dp/B002CMLTXG/ref=cm_sw_r_cp_apip_OHYkr4FWJpWNy