2 In a large skillet over medium-high heat, saute the onions, green peppers and ground beef. Once beef is brown and onions and peppers softened, add the tomatoes, mushrooms and oregano. Simmer uncovered for 10 minutes.
3 Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13 inch baking dish. Place half of the cooked spaghetti into the prepared dish. Top with half of the meat mixture. Sprinkle with 1 cup of the mild Cheddar cheese. Repeat.
In a medium bowl, mix together cream of mushroom soup and water until smooth; pour over casserole. Sprinkle with Parmesan cheese.
4 Bake in preheated oven for 30 to 35 minutes. Let stand 10 minutes before serving.
Makes 8 servings
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