Linguine and Spinach with Gorgonzola Sauce

This rich-flavored pasta dish topped with creamy gorgonzola sauce is prepared in no time at all.
Prepare the pasta according to the instructions on the package, without adding salt or fat.While the pasta is cooking, melt the butter in a medium saucepan over medium heat. Add the flour; cook for 1 minute, stirring constantly with a whisk. Gradually add the milk, stirring constantly with a whisk. Increase the heat to medium-high; bring to a boil, stirring constantly. Reduce heat; simmer 3 minutes or until sauce thickens slightly, stirring frequently. Remove from the heat and add the cheese, salt and pepper. Combine the sauce, pasta, and spinach, stirring gently to coat.