INGREDIENTS
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2 links fully-cooked Italian chicken sausage, sliced (You could substitute kielbasa if you prefer)
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11⁄2 teaspoons olive oil
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25 oz jar low-sodium marinara sauce
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2 (9-oz) packages refrigerated light four-cheese ravioli
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10 oz package fresh spinach
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11⁄2 cups shredded part-skim mozzarella cheese