Preparation Steps

• Preheat the oven to 350°F (175°C).
• Cook the egg noodles according to package instructions until al dente, then drain.
• In a large skillet over medium heat, heat the olive oil and sauté the chopped onion until golden brown.
• In a large mixing bowl, combine the cooked noodles, shredded roast beef, cream of mushroom soup, sour cream, sautéed onion, Worcestershire sauce, salt, and pepper.
• Transfer the mixture to a greased 9x13 inch baking dish and sprinkle shredded cheddar cheese on top.
• Bake in the preheated oven for 25 to 30 minutes, or until the casserole is bubbly and the cheese is melted.
• Let cool for a few minutes before serving.