Low Calorie Chicken Fettuccine Alfredo

We had this meal for dinner tonight. It was delicious! I didn't even get a chance to take a picture of it. I have tried many similar recipes, but on the low calorie side, this has definitely been the best!

Low Calorie Chicken Fettuccine Alfredo
adapted from Food Network Magazine

1 Tbsp butter
1 clove garlic, minced
1 tsp grated lemon zest
2 tsp all-purpose flour
1 cup 2% milk
Kosher salt
2 Tbsp Neufchatel or low-fat cream cheese
1 cup grated parmesan cheese, plus more for topping
12 ounces fettuccine
1-2 cups shredded rotisserie chicken

Make the sauce: melt the butter in a skillet over medium heat. Add the garlic and lemon zest and cook until the garlic is slightly soft, about 1 minute. Add in the flour and cook, stirring with a wooden spoon, 1 minute. Whisk in the milk and 3/4 tsp salt and cook, whisking constantly, until just thickened, about 3 minutes. Add the Neufchatel and parmesan cheese; whisk until melted, about 1 minute.
Meanwhile, bring a large pot of salted water to a boil. Add the fettuccine and cook until al dente. Reserve 1 cup cooking water, then drain the pasta and return to the pot.
Add the chicken, sauce and 1/2 cup of the reserved cooking water to the pasta and gently toss to combine, adding more cooking water as needed to loosen. Divide among bowls and top with parmesan.