Anything, really. Usually things that take a long time, so I'd be
less inclined to cook vegetables, but dried beans would be good, chicken stews, beef stews, curry. A chicken stew will cook in 20 minutes (and remember that I like my food overcooked). Darn, I must really go out and buy another pressure cooker, apparently I really need one. I can't get a gasket for my old one, and it's aluminium anyway, I want a steel one.
And I also want that flan recipe!