Combine the salt, thyme, paprika, garlic powder, black pepper, and cayenne pepper into a small bowl and set aside.
Heat a large skillet over medium/high heat. Add in the beef and break down until into crumbles. Once the beef is in crumbled stage add in the celery, bell pepper, onion, and jalapeños. There should be enough rendered fat from the beef so that you do not need to add in any extra oil. Allow the vegetables to cook for about 5 minutes until soft. By the time the vegetables are soft the beef should be cooked through. If there is excess oil drain if desired but leave some for coating the rice and spices.
Add in the seasoning mixture and the cold rice and mix well to combine.