Preheat the oven to 350 degrees.

Cut the peppers in half, remove the seeds, and add them to a 9x13 inch casserole dish. Chop the onion.

In a medium skillet, cook the ground beef and onion over medium low heat, breaking the meat up as it cooks, until no longer pink.

In a large bowl, combine the cooked meat and onions, rice, 1 ½ cups of sauce, and seasonings.

Fill each pepper half with the mixture.

Add another spoonful of sauce on top, then top with cheese.

Bake for 45 minutes. Sprinkle with chopped parsley to serve.