Preheat the oven to 350°F (175°C).
In a large skillet, heat the olive oil over medium heat. Add the diced onion and bell pepper and cook until they begin to soften, about 3-4 minutes.
Add the sliced mushrooms to the skillet and cook for another 3 minutes.
Increase the heat to medium-high, add the thinly sliced ribeye steak, and season with salt and pepper. Cook until the steak is browned and cooked, about 5-6 minutes.
In a mixing bowl, combine the cooked egg noodles with the beef broth and Worcestershire sauce. Mix well.
In the prepared baking dish, layer half of the noodle mixture, followed by the steak and vegetable mixture, and top with half of the provolone and mozzarella cheeses.
Layer the remaining noodle mixture on top and finish with the remaining cheese.
Cover the baking dish with aluminum foil and bake in the preheated oven for 20 minutes.
Remove the foil and bake for an additional 15-20 minutes, or until the cheese is bubbly and golden brown.
Remove from the oven, let it cool for a few minutes, and garnish with fresh parsley before serving.