I plan on making a seafood gumbo pizza for my annual Christmas party. I always make a big pot of gumbo so I will have all the ingredients on hand anyway. A roux sauce* with shrimp, oysters, andouie, and crab.
*My roux starts with browned dry flour, but ends up with celery, bell pepper, onion, garlic, tomatoes, EVOO, and assorted spices cooked down to a pretty thick sauce before I add it to the water. It should work straight on a pizza, I hope.