Wash peppers under running water, remove stem and slice in half from top to bottom. Remove fibers and seeds,re-rinse under cold water, place on foil lined baking pan and set aside.
Pre heat oven to 400 degrees. In a skillet, prepare ground meat according to directions on taco seasoning packet. In a 4~6 qt caserole dish, prepare the rice mix with the full jar of salsa. Rinse jar with no more than 1/3 jar of water and add to rice along with the optional can of green chilis. Cook as directed on package. Don't add extra water.
When the rice and ground meat are done, add the taco meat to the rice and mix thoroughly. Using a large serving spoon, fill each pepper half with the rice and meat mixture, slightly mounding the mix.
Cover peppers with alumnum foil, shiny side down and bake in the preheated oven for 45~50 minutes. Remove foil, cover the pepper well with shredded cheese. (Aprox one heaping tablespoon) and return un covered to hot oven for 10 minutes or until cheese is completely melted.
Save any left over rice and meat mix as a topping for snack crackers.