Preheat oven to 375F.
In a large saute pan, break up and cook the ground beef and hot sausage. Add the onion, bell pepper, and celery mixture. Cook until the beef is no longer pink. Drain off the grease.
Pour mixture into a 9 x 13 casserole dish.
Sprinkle raw rice on top.
Mix the water, onion soup mix, Worcheshire sauce, dried parsley flakes, salt or cajun seasoning, and pepper.
Pour into casserole dish and mix well with the beef mixture. See recipe note (3) below.
Cover with foil and bake for 1 hour.