This pork tenderloin recipe is a wonderful treat and is great when served with rice, beans and tortillas. I highly recommend using the New Mexico Green Chiles, if you happen to have them in your area. If not, you can substitute jalapenos. If you find them frozen or in the can, they are precooked so no need to do anything but put them in the crock pot. If you happen to use fresh chiles or jalapenos, you will need to cook them first.