First, if you are using the pasilla chile, let's cook the chiles just a little bit to get them fragrant and juicy. I like to slice them open, discard the seeds and slice into strips. Add to a skillet over medium heat with some olive oil and let them saute for a few minutes until fragrant. Set aside on a paper towel. If you are using the canned adobo you can skip this step Next, Add the onion and sauté for 5 minutes until softened, stirring occasionally. Add the garlic and sauté for 1-2 minutes more until fragrant, stirring frequently.
Now, we want to blend together most of the ingredients so you can either use a blender, immersion wand or whatever you have handy. If you have to do it in multiple batches, thats ok too. So, we are going to add the chiles or adobo, onion and garlic, canned diced tomatoes, cumin, chile, paprika and salt. Puree until smooth.
Transfer blended tomatoes to your slow cooker. Add your chicken broth and mix. Add in your chicken breasts Cook on high for 2 hours. Once it's done, remove your chicken, shred and then add back into the soup and cook for another hour.
Once it's done cooking, garnish with lime and chopped cilantro.