For an extra large dome, I purchased a couple knobs that have magnets on the bottom and put them on a standard turkey foil pan upside down with a steel 1/4 hole washer that just fits. Holds in steam well.
For example, I quickly singe both sides of canned biscuits then put them on a wire cooling rack under the dome till they are my desired doneness inside. Also using small foil pans over in the corner for heating more liquidy stuff like sauces, refried beans, and melted cheese works well also. I suggest you just scour U-Tube and pay attention to the surroundings of what others have perfected that sometimes they just do and not mention like the above post of "Flat-top-King" and the "Grill Girl" work well for me.
https://blackstoneproducts.com/blogs/recipes?page=1 is also a good starting point. Good Luck to you. Let us know how it works out.
