The way I make them, you put pinto beans in the crock pot with water to cover, set it on high and leave it for an hour or two. Add a can of tomato sauce, season with salt and pepper and put it on low for another couple few hours. Cut up a bunch of bacon, a pound or so to use it up, less if you are just using it as seasoning, cook it over medium heat until it is nice and browned and crackly. While it is cooking, dice up some onion or chop up some scallions, and slice up some celery. Toss these in the pan with the bacon and cook until the onion is translucent and soft. Dump the whole mess into the crock pot and dice up a tomato and toss that in too. Cook for about an hour to meld the flavors. Cook some rice in whichever way you like and serve up the beans with the rice. You can make these into tacos by using taco shells or tortillas and adding some queso fresca and cilantro on top.