Preheat the oven to 375F.

In a large saucepan, heat the olive oil and cook the onions, carrots, and mushrooms until softened.

Add the ketchup, chicken stock, and ground beef, stirring until cooked all the way through - about 25 minutes. Add bulgur wheat, season with seasonings, and taste.

Cut the tops of the peppers off, remove seeds and wash. Stuff each pepper to the top and top with pepper top. Bake for 30 minutes and serve.