Preheat oven to 350 degrees F. Cook rice according to package directions and set aside. Chop mushrooms. Heat olive oil in a nonstick skillet to medium high heat and brown the meat with the onions and mushrooms. Add the Worcestershire sauce and seasonings; stir in the rice to mix thoroughly. Rinse and scoop out the peppers. Place them in a shallow baking pan with a small amount of water. Rinse and slice tomato. Stuff the peppers with the meat mixture and top with tomato slices and cheese. Bake for about 35-40 minutes and serve hot. Enjoy!