"This simple pasta bake has no fancy ingredients. It's an amazingly simple weeknight recipe that's loaded with pasta, marinara sauce, tender ground beef, and tons of cheese!..."
INGREDIENTS
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1 tablespoon olive oil
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1/2 medium onion (chopped)
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1 pound extra lean ground beef
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3-4 cloves garlic (minced)
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Salt & pepper (to taste)
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3 cups marinara sauce (one 24 oz. jar) (divided)
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20 ounces uncooked cheese ravioli (see note)
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2 cups shredded mozzarella cheese
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1 cup freshly grated parmesan cheese