I take the small screen from Home Depot used to hold paint roller tray on a ladder, and then bend the arms to go in the Buddy grate. Has to be the small one or the arms are too wide for the grate. Cook on top of it in a disposable pie pan or similar container. Last week my pie pan was too far back, and it melted the Buddy handle, so watch for that.
I usually toss in some brats and sliced green and yellow peppers. Hang the bag of buns off the top of the shelter to keep them warm.