Just ask David Stafford!!!
Yes...but what KIND of casserole, God's chosen want to know... I mean, it's the Last Supper, after all. The reverse of the postcard goes into even greater detail...
If I didn't know better, and if the postcard weren't so stiff, I might've guessed that this piece was an old used paper napkin on which David subsequently drew around the food particles describing the residue of ecstatically-gobbled Campbell's Soup-inspired repasts out of a multiplex of Pyrex dishware. Because, you know, artists, need to find their muse wherever it calls from...even if it's from the food chunks and spittle on a used paper napkin...
Frankly, this gives me all sorts of ideas for my Thanksgiving smorgasbord. My guests are going to be amazed!