In another medium sized bowl, add the coleslaw/cabbage, the diced jalapeño, and cilantro. In a small bowl, add the sour cream, lime juice, garlic, salt, and pepper. Stir together to combine, and then add to the slaw mix. Stir to combine. Alternatively, instead of using a second bowl (I know, I hate washing dishes, too!), you could just add all of the ingredients into the bowl and stir to combine. I just find it easier to mix the sour cream and lime juice together before adding it to the slaw mix to help thin it a little so that it is more evenly distributed.