Prepare the Peppers: Start by preheating your oven to 375°F (190°C). Cut the tops off the bell peppers and remove the seeds and membranes. Use a small paring knife to carve jack-o'-lantern faces into one side of each pepper. Set aside the tops to use later as lids.

Cook the Filling: In a large skillet, cook the ground beef or turkey over medium heat until it's no longer pink. Drain the excess fat, then add the onion and garlic. Cook until the onion is translucent.

Mix Everything Together: In a medium-sized mixing bowl, combine the cooked meat mixture, cooked rice, diced tomatoes, and Italian seasoning. Season with salt and pepper to taste.

Stuff the Peppers: Fill each prepared bell pepper with the meat and rice mixture. Pack it down gently to ensure each pepper is fully stuffed. Place the tops back on each pepper.

Bake: Arrange the stuffed peppers in a baking dish and cover with aluminum foil. Bake in the preheated oven for about 30 minutes.

Add Cheese: Remove the foil and sprinkle the shredded mozzarella cheese over the top of the peppers. Place back in the oven for an additional 10-15 minutes or until the cheese is melted and bubbly.

Serve: Remove from the oven and garnish with fresh parsley if desired. Serve warm, and enjoy your Halloween feast!