I wanted to whip something up for lunch that I could put into a flour tortilla, and came up with this, which was delicious:  chop up half of a sweet onion and mince two garlic cloves, and fry with a small amount of olive oil.  When the onions are soft, put in a chopped jalapeno pepper, seeds removed, and fry that for a minute or two more.  Next, put a can of pinto beans into the pan, mash with a potato masher, and cook them for a few minutes.  There will be some extra liquid from the beans, but keep stirring and it will evaporate.  Serve the beans plain, or put into a flour tortilla with some salsa.