As seen in the attached picture, the round piece (with smaller holes in it) fell out of the ceiling of my oven into the food. It was inside the metal ring shown. It is slightly too large to fit back in the ring. I'm guessing it is a factory installed piece. I can't find it on any parts diagram. Looking for the part # and name and repair advice. I have been using the stove for months without it so I assume it's not essential but would like to get it done. Thanks.

Thanks for trying to help, 'That Guy.' Your attached jpg shows an assembly with the filter inside the adapter. Ordering Frigidaire 318317006 only sends the adapter, not the filter inside. I tried putting my old filter in but it wouldn't stay in because the new one doesn't have crimps in the side to hold the filter. Appliance Parts does not seem to offer the assembly with both adapter sleeve and filter inserted inside.