Preheat oven to 350 degrees.
Place the 1/2 cup long grain white rice and 1 cup water in a saucepan and bring to a boil. Reduce heat, cover, and cook 20 minutes.
In a skillet over medium heat, cook the 1 lb ground beef until evenly browned.
Remove and discard the tops, seeds and membranes of the 6 green bell peppers. Arrange peppers in a baking dish with the hollowed sides facing upward. Slice the bottoms of the peppers, if necessary, so that they will stand upright.
In a bowl, mix the browned beef, cooked rice, 1 can tomato sauce, 1 tbsp Worcestershire sauce, 1/4 tsp garlic powder, 1/4 tsp onion powder, and salt and pepper.
Spoon an equal amount of the mixture into each hollowed pepper.
Mix the remaining tomato sauce and 1 tsp Italian seasoning in a small bowl and pour over the stuffed peppers.
Bake for 1 hour in the preheated oven, basting with sauce every 15 minutes, until the peppers are tender.