@so so For this size cooker it would mean 7 cup capacity including liquid, to leave head room and the solid food recipe portion you would fill it only to the halfway mark.
So, some ideas off the top of my head: Probably three chops would fit in it, steel cut oats, grits, vegetable sides, 1 cup of rice, which will double to 2 cups in volume, chili con carne, soups from scratch, a small--maybe up to 1 and 1/2 lb. chuck roast, a portion of a pork loin, a couple of cornish hens, maybe halved or quartered to fit.
The main thing is to look at 4 or 6 qt. pressure cooker recipes and reduce ingredient amounts by 1/2 to 2/3rds. When I'm using a pressure cooker recipe for the first itme I set it for a little less time than the recipe states because I can always repressurize the dish again if it needs to go a little longer but can't undo too well done.
Hope this helps.