Cook pasta according to package directions, drain. Preheat oven to 350 degrees F.
- Melt butter in a large pot; add flour and cook for 2-3 minutes. Add chicken broth, whisking to blend. Bring to a boil and allow to thicken slightly. Add cooked broccoli, and chicken and heat through. Remove from heat.
- Off the heat stir in the yogurt, pesto and the parmesan cheese, and heat slightly. Toss with the cooked pasta.
Tip: : You can easily cook the broccoli by adding to the pasta during the last 2 minutes of cooking time, and drain together.