"Get this all-star, easy-to-follow Cheesy Sausage Rigatoni recipe from Ree Drummond..."
INGREDIENTS
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1 pound rigatoni
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1 onion, finely diced
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2 tablespoons olive oil
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1 1/2 pounds Italian sausage
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1 teaspoon crushed red pepper flakes
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Two 25-ounce jars marinara sauce
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Two 8-ounce balls fresh mozzarella, cut into large cubes
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1/2 cup grated Parmesan
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Minced fresh parsley, for garnish