Brown ground beef and chopped onion in a skillet over medium heat. Drain excess fat.

Add chopped green pepper, canned mushrooms, tomato soup, water, and Worcestershire sauce to the skillet.

Simmer for 5 minutes, stirring occasionally.

In a 9x13 inch baking dish, layer the meat sauce, uncooked noodles, and grated cheese.

Repeat layers as needed, ending with a layer of cheese on top.

Bake in a preheated oven at 350°F (175°C) for 30-35 minutes, or until the noodles are tender and the cheese is melted and bubbly.

Let cool slightly before serving.