"Bonus: It's super easy...."
INGREDIENTS
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1 small yellow onion
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3 cloves garlic
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1/2 cup drained oil-packed sun-dried tomatoes (2 1/2 ounces)
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1 ounce Parmesan cheese (1/2 cup firmly packed freshly grated or 1/3 cup store-bought grated)
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2 large boneless, skinless chicken breasts (1 1/2 to 2 pounds total)
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1 1/2 teaspoons kosher salt, divided
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1/2 teaspoon freshly ground black pepper
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2 to 3 tablespoons olive oil, divided
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2 teaspoons dried Italian seasoning
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5 ounces baby spinach (about 5 packed cups)
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1 1/4 cups heavy cream