To achieve flavor quickly in this sun-dried tomato pasta recipe, we use the oil from sun-dried tomatoes to create the base of the cream sauce. Meanwhile, the residual heat of the pasta wilts the spinach in record time for a fast weeknight dinner.
Meanwhile, heat sun-dried tomato oil in a large skillet over medium heat. Add onion and sun-dried tomatoes; cook, stirring, until softened, about 3 minutes. Add garlic, crushed red pepper, salt and pepper; cook, stirring, for 1 minute. Increase heat to medium-high and add broth; cook, stirring, until reduced by about half, about 2 minutes. Stir in sour cream, Parmesan and butter. Add the spaghetti and spinach; toss to coat well.