Prepare the campfire for cooking over high then medium heat.
Season the beef chuck roast with salt and pepper.
Preheat 12 inch cast iron Dutch oven for searing the meat with high heat.
Place vegetable oil in the pre-heated oven and wait for the oil to get hot (this will not take long.)
Brown roast on all sides in Dutch oven over high heat. Don’t forget to brown the ends too. The meat is seared and ready to flip when it releases from the Dutch oven … if it is sticking, it is not ready to flip.
Reduce heat to medium and add the beef broth, fire roasted tomatoes, diced green chile peppers and Mexican seasoning blend.
Cover and slow simmer for 1 1/2 hours.
While the roast is cooking, peel and cut the potatoes and add them to the pot around the outside of the beef roast.
Continue to simmer covered until meat and potatoes are fully cooked through, approximately 30 - 45 minutes longer.