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3/4 pound 90 percent lean ground beef
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1/3 cup onion, chopped
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1 clove garlic, minced
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1/2 teaspoon oregano
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1/2 teaspoon salt
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1/4 teaspoon pepper
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1 (4-ounce) can sliced mushrooms (do not drain)
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1 (16-ounce) jar meatless spaghetti sauce
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8 ounces spaghetti, cooked and drained
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Nonstick vegetable cooking spray
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1/3 cup light sour cream
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1 cup low-fat cottage cheese
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1/4 cup parmesan cheese
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