Cook rice and set aside. Cut off the top of 4 bell peppers about 1-inch down from top. Clean out seeds and membranes. Throw away the tops.
Preheat oven to 400 degrees.
In a large nonstick pan, brown ground beef and onions. Season beef with a little salt and pepper. Be sure to break up ground beef into small pieces as it cooks.
Stir in Worcestershire sauce, ketchup, mustard, pickle relish, tomato sauce, and 3 tablespoons water. Mix well. Stir in ¾ cup shredded cheese and cooked rice. Mix well and continue to cook until heated through. Add 1-2 more tablespoons of water, if getting a little dry. Remove from heat.
Stuff each bell pepper with ground beef mixture, top each stuffed pepper with 1 tablespoon shredded cheese. Place each in a 9-inch baking dish. Pour 1 cup water in bottom of baking dish. Cover dish with foil and bake for 40-45 minutes. If peppers are not soft enough, cook about 5 minutes more.
Once cooked, cooled and wrapped, they freeze great!