The other day I was feeling lazy and had proposed "melts" -- cheese on bread with stuff -- but then I got even lazier and didn't want to have to stop off somewhere for bread, so I had an idea: what if I made up, say, a half batch of pizza dough, and then made little individual deep-dish pizzas in a muffin pan? Worked like a charm! Some rolled out dough in each cup (not that different from making tarts) then some pizza sauce, some topping stuff (mushrooms, onions, green pepper, bacon, all pre-fried) and then grated cheese. Fifteen minutes in the oven, and the result: a dozen wee pizzas!
There's probably a hundred photos of this on Pinterest, but I swear on a stack of pancakes that I thought of it independently. :)