I got this idea from my friend Katie, who wrote about Easy Empanada Muffins in her blog. She even made up the name herself. :)
We unrolled some Pillsbury dough and pushed squares of it into a muffin tin. Then, we spooned our filling into the little dough pockets. This time, our filling included sauteed onions, garlic, pinto beans, cheddar cheese, hot sauce, and tomato. John cooked up some ground beef and added some of that to his. (I say "this time" because we plan to try variations like pizza muffins and ratatouille muffins.) Then we folded the the dough corners over the top and stuck 'em in the oven. John included some extra shredded cheddar on the top of his.
If you really want to try this, you should read Katie's blog. She's much more descriptive.