"Another family favorite casserole...."
INGREDIENTS
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1 1/2 cups uncooked small shell pasta
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1 lb lean ground beef
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1 cup sliced fresh mushrooms, divided
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1/2 cup chopped onion
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1/2 cup chopped green pepper
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1 (15 ounce) can tomato sauce
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1 teaspoon dried oregano
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1/2 teaspoon garlic powder
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1/4 teaspoon onion powder
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1/8 teaspoon pepper
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1 cup shredded part-skim mozzarella cheese, divided
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8 teaspoons grated parmesan cheese, divided