INGREDIENTS
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2 lbs ground beef
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1 medium onion, chopped
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2 cloves garlic, chopped
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1/2 tsp oregano
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1 jar (25 oz) marinara sauce
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1 box (16 oz) ziti noodles
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1 container (15 oz) ricotta cheese
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1 cup grated mozzarella cheese
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1 cup grated Parmesan cheese