Make cooked food drop from mobs that die on fire [1.20]

[msgicbeans]

I just want to make a specific drop for when a mob is killed by a player with a specific item while on fire like how vanilla cows and pigs work. I have the item working with the helditem condition but I can't get the fire to work. I've tried using the "source" and "fire" conditions but neither have worked so I may be doing something wrong.